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Old 12-11-2018, 06:20 PM
sfarndell (Scott)
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sfarndell is offline
 
Join Date: Nov 2007
Location: Melbourne, Australia
Posts: 63
entered your details here https://www.bbastrodesigns.com/ronchi.html

You'd also need to tell us what your Rochi LPI are. I assumed 4 per mm, ROC of 840mm. Using this you seem to have an over-parabolised edge. I'd return to a sphere using the full-size lap with a 1/3 D stroke, offset from centre. Likely you still need to polish out the mirror anyway so this shouldn't take too long.
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