ATM placement of a secondary mirror

["Scott Hahn" <HahnST@worldnet.att.net>]

I have a quick question concern attaching a secondary to the mirror's holder.  I'm attaching a 1.00 minor axis mirror.  The glass is an 45 degree eliptical flat.  It has a thickness of approximately .25".  Looking at the reflection of the glass you can see a bit on the underside that isn't coated.  The coating is offset (I think this is the correct term) because of it geometry, how should i place the mirror?  Does it make a difference if the 45 degree uncoated edge is located closer to the focuser or further away from the focuser?  I hope I explained my situation clearly.  Thanks.

 

Scott