4 Months and I'm done with my first ever mirror and it wasn't an easy one being 18" and f3.3
I'm sure Figure XP is more than optimistic but I've spent the last few hours going over and over and turning the mirror and i can't get any different results.
There is a little roughness an inch in from the edge but in fear of stuffing it up a don't want to do too much of anything else. I have run over the mirror with a larger lap to smooth things over a bit.
Ideal