Matt, that 18*12 Meslick {spelling?} I was running on the 145 turned about 500-600 rpm less than the 17*13APC before I shortend it, it was quite as well. It was still a heavy load for the 145 even after taking an inch off the 145 was spinning it around 7500. The 145 is much more happy with the APC 17*13 spinning around 7800-7900. I am planning to run the Meslick on the 160 after break in.