I ran .028 on my 392 for 2 years @ 7500 with no problems.... the guy i sold it to sprays 200 shot on it for the last 3 years and its still going.... I run .058 on BME alu rods on my 414 now...... .... maybe I should tighten it up some ..... Hey nice work on the w5 408 ... what rpms did it end up pulling to?