ok i been building designing model airplane for over 30 years some have been in magazines a plug in wing and a one piece wing are 2 completely different things the joiner tube is the spar !! if the lancair is snapping wings its for 2 reasons a bad desingn or poor construction as far as glassing the center section it will add a tremdious amount of strength the sheer webs go verticle always have always will i use to build professionally from scale to giant scale 3D but i dont have time any more there is a book RCM use to sell it was called desinging and buiding rc airplanes i think alot of guys here would benifit from reading it

with the advent of all the arf out there most people don't know what holds a plane together i only know of a few kits with one piece wings that were not glassed but hey i only have about a little over a hundred buids to my credit

JIM