Came across another 961 while out on a muzzleloader trip last weekend. Got to talking about it with the owner and now I own it. Everything is decent on it but the oil pressure drops to about 10-15# when hot and at idle. At PTO speed, it's about 35#. I changed the oil and filter and it's about the same. No smoke and runs smooth so I'm thinking it may need rod bearings and mains? The rod bearings don't look like anything too tough as I read through the service manual but the mains are what I'm wondering about. Do I do them both at once? Rods and mains? Just from looking at the manual, if I pull the main caps from the bottom, can you get a micrometer in there for an accurate measurement? When I pull the rod caps, do you just push the piston up to access the rod bearing and make room for the micrometer on the crank? This will be the first time on bearings for me so please bear with me. Manual says it can all be done from underneath. Any tricks I need to know before I attempt it? Kinda looking forward to this. Thanks! Tom