I just installed my U400 and I can’t get the bottom of the inner panel to sit flush against the door. It might be 2-3mm or so from touching the door whereas the top is fine. I thought the tailpiece might be too long so I tried removing a tab, and then a second one. I don’t want to remove any more until I have more information. Is it possible to determine the minimum and maximum length that the tailpiece can be proud of the inside of the door?
Would there be another reason why the bottom of the inner panel won’t sit any closer? I don’t think the cable is getting in the way.