Success on 3rd attempt (previously tried once with Flashforge Finder; that one fused at arms, and they broke at thinnest spot.)
Tried 2x within 24 hours on Ender 3; first one I printed on its face/platform, and filament broke half-way through print. This last one i printed it vertically with screw bolt on top (so it looks like a flask) without raft. Bottom fused arms together on bed, so I carefully used Xacto knife to cut apart. On the same side, one of the semi-circle sliding pins (pictured on open platform pic) also bonded to the platform slightly. Think a raft would have helped with fusing. 220c/50c
Used a couple of drops of oil on screw at top and bottom due to squeaking/friction. Works flawlessly!
.65 mm tolerance (the modified file)