"Newly soloed student pilot...."

Didn't have to read a thing after that to reach the conclusion that any initial test flying should be conducted by someone else, who can give him a proper checkout with specific comments on his particular aircrafts handling qualities and/or quirks when he's more fully capable and has more glider experience. On the pro side of the aviation world, we like to say that if you'll "work it backwards from the FAA/NTSB hearing- you WILL arrive at the right answer" to questions like this.

My 2 cents.

Rob
ZAP