pipedreams86
I still have the stuff needed to make more so I can make another batch if there is interest.
I stopped making them as I was surprised at how little torque was needed to unscrew the piston in my brand new Leva and thought the tool was a bit OTT. Now that the machines are older it is possible that the piston will be seized in and the tool may be more relevant.
Jony If the pistons in your Vostok are really stuck you can borrow my piston tool if you sort out the return postage.