sell that saito and get this (if you need some cash) http://www3.towerhobbies.com/cgi-bin...?&I=LXXRH4&P=0 the saito in that plane would really haul it around but the magnum should do just fine.

i would go for it, let someone else maiden it (someone you trust). then just fly the plane, with some expo.
if you want some practice, set your trainers throws as high as you feel comfortable and have at it. also move the battery/ect farther back the make it more tail heavy.
on maiden day bring both planes, fly the trainer it settle your nerves then the 4*