Building a fairly large sci-fi model, which will need a fairly robust frame underneath it all to hold it together. The thing is easy enough to do, but I want to try and make it so that the finished product will be buildable by others. I have built a nice 3D mesh, which I imported to Pepakura ... easy enough so far... but the internal frmaes are just solid pieces. They need some kind of slots or keys to position them in the right place, and I can't work out the best way. Whats the favoured option here? Chop up the pieces and do it with butt joints and fillets for strength .... or try to cut thin slots to fit the pieces together. It's quie a big model ... so the slots would be very small in relation to the size of the parts. Don't really want to trial and error this one... it's a lot of card to waste if I screw it up!