I have this Echo 30cc engine. It has needle bearings I think. I have to split the case but the bolts are stuck. May have to heat area where threads live. I wonder if spacer washers(shims) could be placed so end play can be reduced. It looks like about a .080 thick thrust washer would fit in easy. How about it RCIG1? Or any oher inteligent beings! Ha! You know engines GuRu,s.