Tell him to throw a half a pound or so in the nose, and feel the difference in IMAC... I flew my Sukhoi with a ZDZ 80 and the servos in the tail... it was OK, but I liked it more with the weight and servos moved up(I used a pound).

I know the BME 100 is roughly 5lbs, no mufflers or ignition. My ZDZ 80 is 4.7 with everything except the mounting bolts and battery.

You just have to try a Cap to see what I mean...