As long as you're following this thread, Josh, if you're going to offer these masks, are you going to give any consideration to the slit spacing? I'm unclear how important this is because, not knowing Russian, I haven't read the original thread. But my 8" OTA is an Orion 1000mm, and your site doesn't say whether the slits on an 8" mask are 3mm (for 1000mm f/4.9) or 5-6mm (for a 2000mm f/10).