I wanted the mounting plate for my hyda-boost brakes coated[can't have raw aluminum], for I decided to take it apart. HA!.... It wasn't meant to be disassembled, and it looks like they may have had issues with one at some point[so much effort to make it not come apart]. It's assembled with a toothed nut, nuclear lock-tite, and a snap-ring just in case[plus no access with regular tools]. I had to make a socket to fit in the recess of the plate, and over the back of the hydraulic unit. We started with a 3/4-drive Proto ball-joint socket. After about an hour on the lathe and mill, I had a socket that would fit....it took a 3 foot adjustable wrench and some grunt to get it off. We did, and milled the free advertising off as I prepped the piece for powder.