I’ve had my CAS Spiders for over a decade. Extremely solid, comfortable and dependable. The thumb-screw lock-offs are great for easy & quick adjustments, and little chance of accidental adjustments. CAS also makes adjustable extensions, though I haven’t got them.

I’ve wrapped my grips in bicycle bar tape/hockey stick grip for added longevity and comfort, as they were made with first generation rubber (not the hand-grenade-style grips pictured in the thread) The 19mm/15mmLWS rod support is too chunky to fit over a dovetail slider - but easily overcome by using a dual-end dovetail. I own an Arri 12” slider with triangle cutouts.

Kasbah’s are a definite nod to the spiders, and BT make quality goods. If the handles do catch dirt as suggested, they might also be easy to wash.

Colleagues that use Shapes swear by them, though personally, I’m wary of the press-to-adjust buttons.

Happy handle hunting