If a cylinder has enough ring ridge to make the pistons difficult to remove, it probably needs a rebore and oversize pistons. Cylinder wear happens mostly in the top 1 1/2 inches of the piston travel and more than 3-4 thousandths of taper wear makes for a VERY short lifespan of a re-ring job. The constant flexing of the rings trying to keep up with the changing cylinder diameter destroys the tension of the rings in a hurry. At 2500 RPM a ring in a taper-worn cylinder is flexing 5,000 times a minute!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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