I don't really notice too much sag with my Tuniq. The cores on my E6600 stay pretty even, so I think I got it nailed just right. Hopefully *fingers crossed*, I will actually have time this Saturday to get my 900 torn down, the 300 built and start on a couple of the mods on the 900. Have a client at 10am and another at Noon, but hopefully the rest of the day will allow time to get my projects moving again.