ok idid this stand because im a registered nurse, BUT! it is real easy real cheap and works great;
get a garage sale folding walker...no don't swipe your grandmom's!... i don't pay more than 10 bucks. also buy a pair of alum crutches 4 buck or so, walker and crutches should have the push button extention adjusters. take the "foot" or extentions out of the crutches and slide em all the way appart. cut em with a hacksaw roughly in half and form a "u" shaped adjustable "cradle" make 2.(this stuff cuts real easy)
use some of the remaining alum tubing to make two 12" straight pieces to make a shelf that is integral to the cradles for wings, spads, etc. that won't sit in the cradle. my .15 HOR rail job fits nice on mine. OR make the cradles out of pvc or wood. make a simple board shelf to sit on the side braces of the walker for your flight box. this easier to make than it sounds REALY.. mine only took a copple hours to finish 1/4" althread and some nylon insert lock nuts was all i had to buy. less tha 15 bucks apprx total cost. folds super easyand small and stays cleaner than wood