Hi Brian
I fly an Aviation Design large Rafale with a 27lb thrust AMT Pegasus in it for a friend who builds but can`t fly and i still get the shakes and ive been into jets now for 5 years i also have an Avonds F15 with a Mercury hp in it but i dont know wether its the design or what but i find that the Rafale bleeds off speed very
rapidly once the nose is up but the F15 is ok but if you worry about the cost get out but if you enjoy the rush stay with it
it only gets better

Brian
England