Bump for quick test... Finally put brand new OEM caps on the cooling system, 108kpa upper res, 137kpa on the Mishimoto rad. Took it for a nice leisure drive and to get dinner for my family. Haven't blown any hoses off yet. Will check my overflow bottle when I get home. Crossing my fingers for good maintenance! Don't hear any boiling from the upper res tank after making the fans come on twice this afternoon. Seems to be holding at 187-190F on Accessport monitoring the coolant temp at the stoplight after a brief 80mph drive. Stay tuned!