Shutter problem in Mamiya Sekor C 1:3. 8 f 127mm for Mamiya RB

This MamiyaSekor C 1:3. 8 f127mm for Mamiya RB had some Shutter problem, and it was because of old sticky grease in the advance and shutter gear, I clean it with some Isopropylalcohol 99 and relube very, very little on the gear ring, and the lens was back to working order. To disassemble the lens, you need some tools: This is the type of the rubber tool I use from Amazon: Those are the cone rubber tool to unscrew the lens name p