Hello Erik,    Yes the model wings and tails are from moulds....strong....well i wouldn't  use it in a 7+ m/s wind but i have also to say that it has already raced in  a 11 m/s wind with gusts at 15, and did not break...not even bend on launch,  but i have to say we used winches that day, so not the power of two man  towing...but manage to break 4 times the treated  1.2 mm lines....anyway  using it that day did not proved wise, but as i was the organiser of the  race i had no time and willing to set the spare model, also because i sold  the spare that same day.....:-)  What i can tell you is it is far more strong than a Pike sl, and that was  enough for the purpose we look after.  Next, almost ready to get out of th molds is the windy version, i am quite  curious about what the weight will be, hope in the 2100 gr range, and will  be hopefully strong enough for any legal wind, with ballast tubes (the light  one hasn't any) and a more sound structure...  The main lesson from the guru? 80 gr glass outside skin, 60 gr kevlar where  servos openings and seating area, 2 mm rohacell , 1.6 x 28 mm carbon roving  top and bottom, , 50 gr glass lenghtwise inner skin, spars made from 6 mm  thick divinycell 75 kg/cubic m with 200 gr carbon diagonal on one side,  (sort of a sock spar but without the top and bottom part of the  sock...heavy), and very, really VERY LITTLE    filler when closing the  moulds, just wood blocks where the fuse fixing screws  go through.  If it is worth going to these weights is anyway still under study, as i  already told you, still on testing, when i'll have the heavier one i'll tell  you if i will just fill the lighter with a ballast tube and use it always  half full or leave as it is....what's sure is that it is much easier to use  as a hand lauch glider, but may be this is no interest in  competition...:-))) except when you have to scratch those few last seconds  at ground level....  It is very easy to get up in a thermal, but it is more nervous in  turbulence, slower means it gets nearer to the stall without  stalling.....and a few other things i still i have difficulty to get used  to, so...advantages and disadvantages....all in all my all-time still  preferred one was (is) 2.3 kg on 67 sqdm...fast but very effective in  competitions...starting to think mh 32 is not a good profile to slow down  with lightweights....we'll see.  About koptokaff: 2.8% camber....looks as it would be needing a good elevator  surface or a very long tail moment...:-)  74 sq dm on 3300 means also great cords, or no tapering at all, and as i  guess the first is the likely to be your choice, i am quite interested in  how such a higher Re working wing woul behave....good choice, definitely  should be a good project to take with you along with the Trinitus...or to  start in the category.  Ever had the occasion to try cnc cut cores? or there is any reason  preventing you from using them (inaccuracy or whatever) there is also a site  explaining how to make your own cnc cutting machine, doesn't look difficult,  having the time to do it and no other source for the cores (both which not  applicable for me, i have never enough time and a friend who is doing the  wing cutting as a job...:-)    Bye for now  sorry for being so long, this evening not willing to work on models...  Claudio