Excellent. I'm a scratch builder myself and enjoy the smaller lighter RC models over the larger ones because of the loss of outdoor suitable flying sites in California.
I think that I would probably cover it with either Cling film (kitchen wrap) or maybe by floating covering Dope on water - that’s what I used years ago on Indoor endurance model which had a rubber motor. Nice idea using Depron, I’ve used that myself for sub 250gm models, I built a 30” STOL fun fly which used a small brushless motor, it’s great fun to fly outdoors when there’s not much wind!
if the main wing is NOT going to have a Center Section, then the wing mounts NEED to be contoured, Accordingly. WHEN the model is LEVEL, the Mass of the main landing gear SHOULD BE BELOW the wing leading edge.!!!!
information. still LOTS of room for improvement. at :37, the use of polyhedral, and incorrectly located landing gear, are Still the opposite of smart.! at 2:33, the use of CF for pushrods and spars is Still the opposite of smart.! the dom is Still wonky, with an excess of mass/landing gear/servos being located right at the nose; and mass located at the 'top' of the fuselage. the tail is still FAT; as result of poor stab and rudder design.! at 3:11, the chord lengths of the rudder and elevator SHOULD BE EQUAL.! the vert-stab leading edge SHOULD BE at a slope of 75 degrees.! part of the rudder is MISSING.! it is correct to use a few degrees of sweep, at the horiz-stab leading edge(s).! the control horns are not correctly located.! there is still a significant amount of excess mass, in the 'structure' of the stabs.! at 4:07, this is called 'making a mountain out of a mole hill'.! at 5:37, this is a LESS-than ideal wing profile.! consequently, the wing is making significantly MORE-than a nominal amount of drag.! this type of (single-surface) profile should LOOK LIKE the Upper Surface of a clark-y.!!! with the leading edge being elevated (as you have done), 'in place of' the 'rise' at the leading edge of a Two-surface profile. googletranslate st11.ning.com/topology/rest/1.0/file/get/3692001511?profile=original