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It’s not for the ability to replace the gear plates, I’m looking at re-spacing them with thinner spacers to make an older HED wheel compatible with my retro indexed 10-speed setup. Just meddling at this point!
Jonny69-
+mdcc_tester is your man!
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I’m looking at re-spacing them
Never gonna happen. Sprockets smaller than 16T are mounted on the stub which extends outboard of the freewheel mounting thread. The 16T and up sprockets which wrap around the actual ratchet body are necessarily on a bigger spline. This means that you have a big shoulder on the body forging which has 3-4 large sprockets on a large spline, then a drop down to 2-3 smaller sprockets on a small spline, then 1-2 smallest sprockets with a built in spacer threaded to the body/one another to hold it all together.
The probability that you can move the big sprockets outboard with thin spacers and move the small splined sprockets inboard with thin spacers and grind down the built in spacer on the smallest sprocket(s) and still have it all assemble tight and correctly spaced for 10-speed is vanishingly small.
There's also a distinct possibility than the 3/32" 7-speed sprockets will be too thick to run and shift 11/128" 10-speed chain in an acceptable way.
coventry_eagle
gbj_tester
Most have removable plates and can be disassembled, problem is that replacement cogs might not be available.
IIRC Campagnolo used to have a full set of cogs and spares available for its freewheels. Maybe Regina too.