Thanks guys. I bought a Stuntin' Ringmaster .35 Pro. I intended to put a McCoy .35 on it. Although it runs great on the bench everything I read about them on the forums has me thinking I had better find something else. The next CL engine I have is an ST 21/46 it's 4.5 ounces heavier with a muffler. The closest choice by weight is a Fox .36. It's only .6 ounces heavier but it's R/C. This is a new experience for me I've been flying RC for many years and 1/2 A CL on and off. This will be my first CL experience in this size range.