We can have differnt opinions :) Ours views are just reversed on the 2 flywheels...... Before the RPS came out the JUN was the only one I would have recommended. I like the RPS the Best and JUN would be second. Only a couple small things to point out..... The RPS inserts are twice the thickness of all the other flywheel insert on the market and they are in pockets in the aluminum flywheel. The metal plates are bolted to the aluminum and the aluminum does carry away the heat.
I did try to resurface a JUN Flywheel once and the machine shop could not cut the hard spots. The tool simply skipped over the hard spots because it was so hard. The machine shop also told me they would not resurface one of those flywheels again because it ruined thier tooling.
