Scanning Z probe coils

ortondale

About to add Z probe scanning on next upgrade
At Formnect 23 Tony Lock introduced the SZP board along with three coil types, one of which was a design to allow a Bltouch to probe through the centre of the coil before scanning the bed. The other two coil types are the ones currently being supplied with the board. Can anybody tell me if the Bltouch coil is available, if so where from, or did Duet drop the idea.
If using one of the supplied coils is it workable to drill a hole in the centre and probe through the coil.

droftarts

@ortondale The BLTouch SZP coil at Formnext was a prototype. It's other feature was that its mounting centres matched the BLTouch. I think it hasn't been fully tested to see if any parts of the BLTouch affected the SZP readings. @T3P3Tony would know that, or if there are any of these coils any available.

I don't have the full schematic of the existing coils to know if they could be drilled, apart from the images shown here, which do make it look like there's space: https://docs.duet3d.com/en/Duet3D_hardware/Duet_3_family/Duet_3_Scanning_Z_Probe#coil-dimensions
Though I'm not sure if it would affect the SZP reading, or if I'd be brave enough to drill one out myself!

Ian