Dragon ... I have seen a few P40s fly ... they will not fall apart ... the white glue is probaby hot glue. How much is a WM vs. GP? The P40 is totally non-scale and comes in hot enough, not too hot. You really do not need to work on the plane. She will hold up ... seen quite a few take a beating.

I have flown the:

i. WM T34 ... flies as smooth as silk, great first low wing (Good instructions)
ii. WM Rambler 45 ... really nice to fly and superb 2nd plane, not too acrobatic but flies really good (Good instructions)
iii. WM Sky Raider Mach II ... great for pylon (Good instructions)
iv. WM Super Chipmunk ... SUPERB plane!!! She can knife edge with almost no coupling! (Good instruction)

All the above planes have most acceptable construction. Non of them came apart etc ... the T34 I flew was over 6 years old.