Thanks Rick,
The method is tried and true. I have made glassless carriers from mat board and other materials from phenolic sheet to copper clad pc board stock to Teflon. I just found out that they never made one in 6x9, but have secured a 4x5 glass carrier which will do.
Thanks for your input . I have found that they never made a 6x9. I have secured a 4x5 glass carrier and that should do fine. Masks are easy to add on the back side.
Regards,
chris