Hi ,I have removed a few using the hacksaw blade method,slow and laborious,and best done over a few sessions with a mate involved.Have you made a holder for the blade,?,,, imo that would make all the difference as you can't put any pressure on the blade without it bending and jumping out of "groove"..I'm intrigued,,Shame I've done mine.Best of luck with the buisness,,a very impresive array of skills and equipment and some lovely finished items.Good website also.
Mark