I'm will be getting back into the business next year and will be in the market for a new (or new to me / slightly used) aerator. I ran Ryan la-28's with Honda's, b&s's, Kawasaki engines for 3 brutal years. They all kicked my butt but did a superior job at pulling the cores. The Honda engine was most reliable, faster than the b & s, and a little slower than the newer Kawasaki. I have no experience with the rock solid pullr's but after doing a few searches, read that many here like the machine. Anyone have experience with both or an opinion either way as to which would be the better purchase? I have questions about plug depth with the rock solid's. Thanks for the input.