calibrating star probe 0.5mm x 10mm

calibrating star probe 0.5mm x 10mm

Hello everyone!

I am trying to calibrate a star probe assembly 0.5mm x 10mm
When i try to calibrate, the head is too close to the sphere to the point that the module touches it. Is there a special setting of calibration for very short assembly like this or do i have to just put an extension at least 5mm?
Looks like this.

Thank you! ☺