Boy is this thread getting convoluted fast. OP asked about the gapless tops in an effort to reduce oil consumption. So they reduce blowby--BFD. I've seen engines with a lot of blowby make very good power--I've also seen the same engine freshened up to near zero blowby with conventional rings--Near ZERO power change. Again if using a leakdown test number as a badge of honour or a few more cranking PSI is your thing--have at it. My recommendation is to NOT use them. I don't care who uses them--I won't. J.Rob