I plan to dis-assemble my Saito 45 shortly to give the bearings a good clean. I have pulled apart & re-assembled many 2 stroke engines with plain & ball bearings but none with a ringed piston. I am not concerned about re-setting the timing as I intend to study carefully, take some pics with the digital camera before I start & then work steadily. My concern (imagined or real) is sliding the piston & ring back into the barrel. What's the best way/technique to keep the ring compressed so the piston will slide easily back into the barrel?