I am finally ordering these bits:
https://www.amazon.com/gp/product/B07SG84ZBL
https://www.amazon.com/gp/product/B014GXM3UG
That with some 3d printed test parts let me make this
oh yeah need to grab the kfl08 pillow bearings but given they are 608 bearings I can just make the seat in the test arms I print.
Would be good to move away from those sooner rather than later, ok for an early version I guess.