An old friend of mine will drop by this WE with his MS290 to fix. the P&C are dead. Haven't seen it yet but, knowing it has been used for years by untrained WOOFERS, I believe him when he says P&C are dead. Looking for a new project, I was wondering what other cylinders (bigger) could fit (same stroke, rod length... ... ...) with appropriate modifications. I could, of course just port an after-market kit. Nevertheless, I am open to any "more challenging" solutions. Any ideas?