The Elder uses something called trusswork and gussets to keep it straight ..I haven't built an Elder but I looked at the plans and this truss work looks like it could be very strong..with out it the fuse would flop around and have nothing to hold it straight...I am not sure when this truss work goes in or what it is made of..It looks like it could be some kind of wire or string...Looking it over has got me wanting to build one..I have always liked the looks of an Elder..Maybe a 1/4 scale on floats..