Great, thanks everyone for the help!

I will get a request off this week to sort the pulleys out.

In the meantime I have ordered one of the housed bearings which I am using on the drive shafts and the weapon shaft so that I can actually get a look at it. I’ve only actually modelled it from the spec sheets thus far and they are a little bit ambiguous with some of the measurements (to me anyway). The hope is that I will come up with an idea to simplify the bulkheads as they will currently require quite a lot of cuts - hence the large CNC estimate.