I called Total Seal and told them the situation. They said the rings I have were spec'd by Manley to have a 24 lb oil ring tension. And in order to get that tension with a 3mm ring set, the expander must be oversized. Because of this you have to "crush" the expander ring by running it through the compressor before hand with only the oil rings installed on the piston. I already ordered the Mahles in standard tension and am gonna stick with those, but the guy at Total Seal seemed to know his s**t and was bummed that Manley didn't have in their instructions an explanation on the need for crushing.