This is for front droop adjustment only. Ride height is another matter.

Rim clearance to kingpin. Kingpin should not touch rim if you have done it correctly.

Getting the chassis level

I use early ones of these droop gauges like these. The '0' are all same height so the stepped gauge gives the correct reading.

Droop. As I couldn't cut down the ball cup I installed a plastic spacer probably 2mm on the shock shaft below the lower circlip. Do it without oil in case you have to adjust spacer. Gave me about 1.25 to 1.5mm rear pod droop. Yellow line is were I added the spacer.