Are there any tricks to fixing door handles? I've been putting new door handles in the rooms. I've had several where the catch won't spring back properly once both handles have been installed. This is because I haven't got the handle absolutely square and there's enough friction between the connecting rod and the handles or the lock so that the spring can't return the latch properly.
This isn't helped by the fact that the handles are round and the handle itself is a larger diameter than the plate that screws to the door so it's difficult to get the screws to go in straight. They are all at a very slight angle.
The handles need to be accurately positioned, even 1mm too high too too low is sufficient to cause the lock to bind. So are there any tricks for getting the handles accurately positioned and fixed?