Thanks Jonathan.
I need to get some longer bolts for my threaded wasteboard clamps, so for this one I just screwed it down in the 4 corners. I did a circular surfacing pass about an inch larger than the carving diameter, then re-zeroed Z to the surfaced area with the v-bit.
I didn’t do tabs, as the 20" circle was heavy enough not to shift during the final profiling cutout.
As for Aspire pass-structure, do you mean feeds and speeds? Given that this was a V-Carve, there’s not a “raster” or “off-set” choice. As for feeds and speeds, I went with 60 ipm with the Dewalt 611 set on 1.