ORIGINAL: Mr Cox
Well we can't all have your engine guru...
The KB engine is not heavier than a typical .15 BB engine, and it is actually lighter than the Fox .15BB RC engine.
I just said it wasnt very powerfull. Sorry to bust your bubble thinking you got a strong engine. But good luck. There are far worse engines out there. They K&B 18 I had was bone stock. it was on par with a FP 15. it was just as easy to run. The CVA and magnum 15 are much stronger.