Rebuilding a taprite regulator

[GPP33]

I picked up an older (manufactured in 2006) taprite regulator from a friend that's leaking at certain pressures. I disassembled it and found a rebuild kit online, what are people's experiences with rebuilding these? Do they generally hold pressure after a rebuild or is it a crapshoot? There is some minor corrosion around where the diaphragm seats which I'm hoping I can clean off.

 

[GilaMinumBeer]

I've only rebuilt 2. They can be a bit fidgitty to get the central pin to reseat properly but otherwise worked fine.