ALDO I have a CJM mig -15 built it two years ago and it is a nice flying airplane I first flew it with a Jet CAt P-80 that we found out later was not running properly had about 12 lbs. of thrust it used the whole runway here in Denver to take off about 500 ft. but in the air it flew fine with about 3/4 throttle
Since I have installed a P-120 and it flies great and lands easy.
It weighs 28 lbs dry and 33 lbs. with 108 oz. of fuel.
Yours at 20 lbs will fly great especially at lower altitude with a good fan unit
To conver it to a turbine is pretty easy if you need more info let me know.

Don B Miniature Turbine Sales & Service