The dura planes are real fast but the sturdy are smaller then a dura plane and has more wing I have 5 dura planes and 6 sturdy birdy
most of them I made from used parts and some home made parts the wing is the only part I can't make a home but you can't buy a new
sturdy birdys or dura planes any more like all the good toys before they stopped makeing them : ( you can only get one
if you can make it or if some wants to sale it p.s. I like to keep my old junk : )