I have an old Nelson(original case) which has always been a good engine... it hasn't had a new sleeve and piston for at least 100 runs.... likely closer to 150. I did replace the bearings last season. My question is... is there a setup that is good for a high run time engine? I really would like to avoid the $$$ of all new piston/sleeve combos this year for my engines if I could get some decent speed out of my old stuff for one more season. Thanks.

Dan