That's true. They got pretty grimy in photos. I think the main issue is when removing the two parts of the body for inside work. The rails can be easy enough at times but very fiddly on occasion. Despite my better than average eyesight, I've hot that decade when presbyopia sets in!
Noel, any chance of a video of the lollipop method when you get a chance, I tried it but couldn't get it to work, maybe not enough pressure in the right places or whatever. (I know that might be hard unless you have a willing accomplice or a tripod). Not essential but if it's easy to do