I have never seen Balsa ply before, just regular Spruce Aircraft Ply and Poplar Lite(useless) Ply.
Is that something one can order or is it some sort of home-brew balsa ply ?

I think I may turn my MA3 I ordered into a Colossus instead with an additional tube and wood fins for strength.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !