ATM Figuring with machine.

[arning@itn.is (Arni Ingimundarson)]

Hi all...

I think I am ready to start figuring my mirror.  I would like to 
let my machine do the work and was wondering who I should adjust
the stroke??? (it's a elgin type).

Another thing, my pitch lap is poured on a flat plywood circle and
it is now wearing quite thin on the edge (about 4-5mm).  Should I 
pour another pitch lap or can use this one for figuring ???

I have also completed my foucault tester but I was wondering about
the pinhole.  How small has it to be ?  (currently it's 0.8mm)  
Should I change it to a slit ???

p.s.  It is a 8" f/6 mirror.

Thanks in advance.....
--------------------------------
Arni Ingimundarson
arning@itn.is
Electronics Technician
Amateur Telescope Maker
Iceland.