This is NOT a racist question... I have a Polaris 280 Black Max and the backup collar broke (again). I bought a generic G57 white collar, designed the Polaris 280, from Amazon but it doesn't fit. The threads are different. When I bought it, I thought it was just a different color (white) but are the white parts, in this case G57, really incompatible with the black max? Black max collar is G67. I don't know whether I got a bad part from Amazon or if the G57 and G67 are really incompatible. My next option is to go to the local pool place and see what they have that will fit. Thanks, y'all!