What about using existing industrial fittings for the sled ring?

[mcmiley]

I like the idea of having the weight in the ring, it’d lower the CoG for the sled maybe mitigating the need for bricks. Got me looking into ring bearings and I came across slewing rings:

PRT slewing ring bearing low cost

What’s the base diameter of the Rigid?
Reminded me of this thread, but these are still pricey.

2 large bearings instead of ring for triangular sled

Hi, No Maslow yet but following the sled/ring modification threads with interest. I woke up this morning wondering if instead of a ring with bearings on sleds rolling around it, we could just use two large internal diameter bearings e.g. these have 100 mm internal diameter and would allow the router to be mounted in the middle (as with the ring) and one chain would be attached (slightly offset to keep both chain attachment points the same Z distance) to each bearing. I suspect it might be mo…