the one i have is 53% max lockoff i think, and it seemed to do the job with the cruiser calipers. still had plenty left in it to lock the rears off more, had to drive home with rears locked off as far as they could once as i got a leak from one of the rear bleed nipples that didnt go away with tightening the nipple up. still managed to stop ok so it must have been locking a fair bit of pressure off

residual pressure valve doesnt need to be removed, havnt done it in my car or boofs and we both have 4 wheel discs and the rears dont drag

edit: stanza front, shouldnt be locking the rears with them