Okay, so here's a I-shouldn't-show-you-this-yet-but-I-am of part of this new "fancy" version of a slider (photo below).
Truthfully, I've maybe build it up too much now (and it's just going to be an anti-climax).
But, even allowing for that, I'm hoping it's going to turn out in real like how I have it visualized in my head. Weirdly, because of how we're making it, we don't actually have a 3D CAD model of it. So, yeah, I don't even know what it's going to look like until you do too. :-)
Here's the half-machined part: