Is it possible the ones that seem larger are 512x512 I built and you now have the size control mil file in the sights directory with them? If it is, edit the same named mil file and the number 256, make it smaller in 16 or 32 increments until you get the result you want. If they are mine you can find out by right clicking on the file, properties, details. It should show you bustr or keith PC as the owner. And the one you really liked, is it something I made for someone years ago shared around that I might still have, or if you describe it I can probably reproduce it.