Thanks,
I'm concerned that I have a door that is meant to hang from a top bracket and track (like the one in the first picture I sent with the bent track) while the items you're referencing (23-121 and 23-312 and the 23-453 I already bought) are meant to support the door from below (using 23-312). Does that seem right? I'm concerned that if the weight of my door is supported from below (from 23-312) then it will sit too low in the door frame. I'm worried if I just stick a 23-121 on the top of my door and use the bottom bracket I already have (see picture below) it will sit too low. Does that make sense?