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I hope I can explain this so it makes sense.  I have a lighting and sound business with equipment in 19" road case racks.  All equipment is engraved with business name and logo on the face.  Some of the gear for instance Furman power panels have things sticking out of the face like dimmer control knob and lights.  For something with a 1/8" thick face panel does anyone know how much clearance there is between the gantry head and lens cover and the work piece.

What I'm looking for is to know how much something can stick up without making contact with the lens nozzle or gantry head.  Looks to be about 3/8" or thereabouts.

Example picture attached.

Thanks.