Hi RobT,
Normally I don't jump in right away as there are much more experienced members on the forum, but as they have not responded, I take that as my opportunity to put my two cents in.
As I always state (well usually), I am a great fan of "swapology"; ie find an nonworking or hard used pleo and use its neck to fix yours. Remove and replace is what we called it in the military (showing my roots). It is faster if more expensive, but, you could, in the worst of all possible cases, end up with two non functional pleos.
Enough with the philosophical side of things, as you mention as pleos age everything becomes stuck to everything else, due to no small part of the "tinkerings" of prior owners and the over use of super glue in repairs and reskining.
Don't get me wrong, I'm a huge fan of super glue, but not applied by trowel to the insides of a electro mechanical robot. Besides super glue the actual PVC parts get fused to each other to connecting pieces, ie the Teflon like (dont get me lying) spinal cord to the PVC like vertebrae and the black thingie (that's its real name) that secures the end.
Okay so when they assembled this pleo back in the day, the had to pass the spinal cord through the vertebrae, springs, the neck and body connectors etc and then secure it someway so it didn't just slide out. I assume (remember the ass u me) that use some sort hot melt or adhesive method to attach the black thingie.
I have successfully removed the black thingie on some occasions using BFM (brute force method) and that has also resulted in me shortening the spinal cord by one cm or so. I have also found in one occasion that the spinal cord just "fell out" on disassembly of the neck.
What can we draw from this:
1. Could depend on how it was assembled at the factory?
2. Has it been tinkered, moded by another user?
3. Or has natural aging processes caused it to fuse permanently or fall apart?
Not so simple, huh?
You can see some of my other posts where I offer to do repairs for others or send them parts and no one every takes me up on it (he he).
Probably for good reason.
Cheers
Peter
Zaragoza, Spain