The problem with me attempting any kind of IF alignment is...
I have never done it before and have no experience in doing so, and have read that it is not easy to do.
Anything you get from ebay will be in an unknown state functionality wise, and not be in calibration and missing vital input / output probes that can affect the tests you are trying to do, some of which you may try to recreate, but this too can have an affect on the end result.
Right now it seems to be working mostly OK with the injected video, the only issue is the retrace lines that pop up from time to time, which might unavoidable at this point, not sure, given that the normal path of input ( with AGC and everything ) is bypassed.
As I mentioned before, It's unlikely I can ever do an IF alignment myself on it
