I managed to remove my RC vlaves without the puller. You could make one with a stack of washers or something that you can tighten the reverse thread bolt down onto, add another washer, tighten, add another washer etc. unti lit gets loose, but the problem iis the seal and circlip which has got to come out with it. If yours are more clogged than mine it might be tricky.
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MC28 SE -sold-
MC21 with RS250 engine -for sale-
MC21 race bike -soon for sale-