[twowheels]

You've done your homework for sure, and the Sachs forks aren't exactly complicated inside, but that doesn't change the fact that the components are fragile and difficult/expensive to replace if it all goes wrong.

Get the VERY BEST FITTING socket you can find to remove the base valve or you'll be buying a new one ... they are in fact made of room temperature butter. Turns out the large diameter of the adjuster screw leaves the wall too thin ... Best if you already have the cartridge holding tool in place.

Buy or manufacture a tool to hold the cartridge in a vise AND USE HEAT to take the cartridge cap off. It doesn't matter how many sets of WPs your local guy has done ... USE HEAT. This is the tightest fit in all of motorcycledom.

You might want to try to line up some 7mm ID shims before you break into things, or you're left shuffling what you have or just leaving some on the bench.

You will need a cartridge holding tool on reassembly - I'll look for the pics of the tool for the job and post them, or snap a couple more and get them up by weekend's end.

If you don't need to get dirt on the GasGas tires immediately, obtain a set of WPs or KYB open-chambers and practice, or offer to work on your buddy's for free. The Sachs aren't special, they just need a special touch.

Have fun and good luck.