Dust shoe causing Z depth issues

Sharing a discovery I made recently.

I made my own dust shoe with a 2" bristle skirt. Don’t have a pic of it yet; will post later.

I mounted it to the gantry much like the suck it dust shoe, so that the spindle moves independently, the dust shoe stays at a fixed height. However, if I set the height of the shoe such that it touches or moves and scrapes the work surface, it will then cause my Z axis depths to be inconsistent during the carve. Perhaps the strip brush I’m using is a bit too stiff??

Just thought I’d share my findings. I now set my shoe to be just barely above the work surface and then it works very well.