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Sunfish - the best strokes to get rid of TDE are very short 1/4 to 1/5 length W stroke with mirror face up , with some randomness thrown in to maintain or head better toward spherical .
Something like a 200mm mirror is much better fit for the hands and more stable , so you are setting yourself a task with a 100mm . The back should be ground flat or slightly concave. If you can see the mirror rock at all while you are polishing tool on top , this can contribute to a TDE .
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