Hi Domenico Thank you for the nice photos. I like the picture, boat in port and the house on top. So like Vieste some kilometers away. History A good selection of pictures. How easy, difficult is it to set the wing-mast. Any idea about the weight? How is it sailing with the wing-mast? Because we used a wing-mast on a P95. We were to Vlissingen in wind force 7. Making 8 knots. Not a good situation with the strange ebb flow there and against wind waves. It would have being not so difficult with a normal mast (less speed) I see you shortened the main sail already, but there was not much wind. A test? How is the boat handling? A lot of questions, when you have time Ciao Bernd

Hello Everyone. Hope this message finds everyone happy and in good health. I just purchased the study plans for the KD860. a.) I would like to build this out of foam and carbon fiber , s-glass with west/ISOcertified epoxy. Are there alternate plans that I can buy. b.) Are there any singaporeans here , can I meet you up in person , and ask for your experience. Dinner , fooding , drinks on me. c.) The mast location , is presently in the middle of the beds , seemingly , its load unsupported. Can I move the mast to the cabin bulkhead instead , and have the load resting and distributed spread against the bulkhead. d.) I would like to power the boat with inboard , shaft drive , 2 diesels nanni n2.14 , they are 92KG each , how do I compensate this weight on the boat. e.) I would like to have hydraulic steering on the boat , 3 steerings , one on each side , and one in the cabin. Can anyone share your experience with the valving after each helm pump. f.) Is duckworks the only place I can buy the plans from ? g.) Is the beam 5.6 m ? I can see corrections to it afterwards. I'm assuming it is from the outside of the hull. Thank you , and looking forward to be part of the community. Salut. Hamka

I am very appealed by instead of building eco6 to rescale eco 520. But thinking that is there some foreseeable challenges that comes from resizing the plan? 520 appeals to me because of the simplistic sails that can be furled as much as neccessary. Easy operation and easy fixing, looking to build boat that would last from father to son when well kept. Is resizing and option or is it just bad idea?

Hello, I would be happy to know, what glass type and weave are usually meant in the plans (DUO 480 in my case). For example - if in the materials list written 220gr glass, what is the glass type (E-Glass or S-Glass) and weave (Twill, Bi-Axial 45-/45+, etc...) should be used. Another question is regarding epoxy specifications. There is an extremely cheap resin sold in my area named KUKDO YD-128, which is 4-5 times cheaper than other brands. But the specifications are 30% weaker. Would the numbers suffice for a build like DUO 480, or should the best available epoxy used? Thanks alot, Eli.

Hi all, I am Alain. I live in Singapore, moving to Thailand hopefully by end of the year where I am planning to build a boat. This is my first post on this forum. I have been looking around for different possibilities and, at this point, I have narrow it down to Bernd Kohler's catamaran designs after considering James Wharram's Tiki range for a while. At this stage, I am basically looking to build my own training ground to progress toward getting a larger boat for liveaboard and long distance travel. For now it will be local costal cruising and a few passages across the region. I want a simple boat that is comfortable in tropical climate with a lot of desk space and with some sheltered area for sun and rain. When I look at the K-Designs range I am attracted by a few models: 1) DUO1000: I like the permanent rigid bimini and rigid deck as well as the general design and accommodation however this is going to be too costly and large for my purpose 2) DUO900: I like the lack of daggerboard, the overall design with the relatively wide cabins and the cockpit protected right behind the companionway but I am not too keen on the tarpaulin at the center of the boat and feel the hull might be unnecessarily narrow when compared to the asymmetrical designs of KD650 and KD122. I ordered the study plan a couple of hours ago. 3) DUO800S: I like the biplane rig but I am not keen on the central pod and there is not enough space in the hulls without it. I ordered the study plan a couple of months ago as it was my initial pick. So now I am envisioning a DUO900 with a few modifications: a biplane rig, possibly a junk rig for that Asian vibe, low cost and ease of use hulls having the same aspect ratio as KD122 to be able to carry more weight and focus on comfort rather than ultimate performance and possibly a slightly wider cabin with a 1.5m beam as there is not too much trouble driving a 3m wide trailer a couple of time a year if needed. If I wanted something really trailable and go everywhere I would settle for a Corsair trimaran. with a rigid deck in between the hull with some storage for ground tackle and kit forward and a bench aft some kind of bimini at the rear over the bench/cockpit area were I can also put PV panels on top So here are my questions: there are a few designer that have been doing conversion to junk rig that I could use. Anyone here have done that before? is it possible to "stretch" the hull by 20% sideway, i.e. getting the max beam from 1.25 to 1.5m. while keeping the length the same or slightly longer at the front to keep a fine bow. Is this possible without going through a complete redesign? from the DUO900 video, it looks like that the owner added a rigid deck to his boat. I imagine that the deck will have to be constructed around a core to have enough rigidity. Looking also for information here. For a bimini what would be the best construction, what height, width, position would be recommended. Thank you very much in advance for your reply. Best Regards, Alain