Actually I Maidened the Extra today here in Okla. It tracked rather well and needed just a few trim adjustments, I balanced it 4 inchs back from the Fuse. The roll rate was a little slow for me,(with throws as per the manuel).
With the TT 61, I did not have to add any weight for balance. I would recommend the wing skids at the tips, this model will tip stall at the flare attitude if slowed down to much before it lands.
The fiberglass tape was applied over all the engine mount joints that I could reach, and used 30 min epoxy, followed up with thinned downed epoxy for fuel proofing.
Not a bad model for the price, It is solid and the covering holds up well outside.
David