Hey Wendigo..sorry I didn't see the question before...I actually built this model twice and am currently working on one as well..(what can I say, the R1 is one of my all time favorite bikes) the first two models I did were on regular priter paper (80gsm I believe) and it shows now. Not very stable. The one I'm building now is 160gsm I think. A friend printed them out for me so I don't know the exact thickness.And Alan..OH MY GOD!!! that is on half size ya??? I don't know what to say :O