Don't need this any longer. One custom made FSQ106 Bahtinov mask, made of toughened acrylic. Made specifically for the scope reduced to f/3.6, but works fine at f/5 (just need to extend focus exposure slightly).
New, these are here:
http://www.ebay.com/itm/Bahtinov-Foc...item46230cbf39
MY PRICE: $20 POSTED (save $35 over new)
I just bought another for my Baby-Q