Originally posted by B4
Perhaps I need to explain myself a bit better. You need to determine first if the arm needs to be longer or shorter. Once you know this it is a very simple job to remove the arm and change the length, we are talking about a Serpent here so very easy to work on. I'm not saying the length is wrong that you have been told, simply explaining the way I would and do do it.
yep exactly
needs to be 39.5-40mm long.