Coutdown for the 8 inch mirror:

get all the stuff to grind a mirror
build a suitable grinding tool
bevel the edges of the mirror
rough cut
fine cut
carbo 180
0.5 h
1.0 h
1.5 h
2.0 h
2.5 h
3.0 h
3.5 h
4.0 h
carbo 320
carbo 600 (?)
Al₂O₃ 15 µm
Al₂O₃ 9 µm
Al₂O₃ 5 µm (?)
polishing, measuring and correction
metallization
first light

Looks like I'm not able to get control over all the deviations and comments which wait for a comment and a reply. But there is a light at the en of the tunnel: I've announced to fight back the blobb of deviations and waiting comments in my message center. So if you are one of the persons who miss a reply from my side, there is a chance that you'll get it someday - even if the chat lies back many months or even a year .

401 deviations and 135 messages to go!

---

12 inch project material listing:

8x 25 mm x 25 mm x 2000 mm aluminium pipes.................................about 164 $
screws with nuts (100x), M5x40 mm...........................................................11 $
shims (250x)............................................................................................7 $