There are many other choices now - Pilot RC, 3dHobbyshop and others.
Extremeflight use to make some very light airframes, I am not familiar with their current range though
The Kangke Extra also builds easily under 7kg
then of course -t here are many "40cc" airframes that will build under the weight limit

PA is also the great name behind REV engines aren't they?

[link]http://www.rcuniverse.com/forum/m_10100581/anchors_10100820/mpage_1/key_/anchor/tm.htm#10100820[/link]