Dont have actual #'s to offer but bottom line does it have a flat spot and on the other end you dont want it open at a higher in hg than needed. EDIT yes the 1/2 rule is good but when the vac levels are low enough on a particular build it can change that general rule

Last edited by RapidRobert; 03/18/11 09:31 AM.
live every 24 hour block of time like it's your last day on earth