Raise PRO2 PLUS filament sensor shape

[Shelton]

Closed spaces with filament sensor are a bad idea. The simple example from my garden... wrong retraction and filament stuck in sensor closed space. This is a solid CNC machine element. Bad idea. Is very difficult to remove blocked part of filament even with tools! You need good workbench vice and pair of the wooden block to avoid scratches. And the hammer to knock out the broken part from inside...

The sensor should be made from two elements or... have access