Grip level experiments

I'm getting close to finalizing the BOM for the toolhead and ordering the next and improved version. The only thing I want to see is how the filament grip levels compare between a small 623 idler bearing, a bigger 61702 idler bearing, and a dual-drive LGX setup. I'm printing a test rig to see the differences. I have to make this decision before posting the BOM here, even though the difference is only in the idler bearing and the hardware related to that.

In the worst 623 idler configuration, it should already have more grip on paper than the Lowboi MK4, depending on the quality of your LGX/HGX gear. I never really print flexibles and other low Tg materials, so I can't really paint a picture about that aspect of this toolhead.

OTOH, this has been an absolute beast for ABS in the last 4 months or so, even when pushed past my IS recommendations. I've been exclusively printing at 50k accels and 50 SCV on all features, and I can tell you: this thing shouldn't hold back anyone's machine with its rigidity.

Here's some early footage, from when I was still running 9mm belts.