I recently was able to get my hands on a Ringmaster kit. The .35 size profile. I will be using it to make templates for scratch building. When I flew one of these before I used an OS 35 FP but have since converted that engine for RC use. I want to get another engine for the Ringmaster. What would be a good engine for this plane. I saw that Super Tigre now has a 34 CL engine. I can't see the logic in paying $65 for an OS 40 LA when I could get a ball bearing ST for the same price. What are your suggestions?

Thanks,
Brian