Not sure about WD40 and whether or not it could damage the plastic. I didn't use spray as it goes everywhere, just a little dab of grease from my old dive kit.
I have a similar problem where the turntable binds and the clutch gear slips. Have taken it off but can't see any way of rerouting the hoses in a better way.
Fantastic ability to be able to build a replica from just photos and videos. Hugely impressive; thank you!
The link is forwarding to (I'm guessing) your other blog on radio scanning.
@Jims reviews are so in depth and detailed (and have helped me decide on sets as a Technic newbie) that I'll happily wait. I can only imagine the hours he puts into every review and I sure as sure is couldn't do it.