Filter Slot for Cold Light Head

I never liked the idea of those klunky plastic VC filters under a state-of-the-art enlarger lens.......makes no sense.

This uses the Aristo STD 45 cold light head which is designed to accommodate kluge arrangements like this.  The slot was done with a cutoff wheel on a Dremel tool.  And the light trap, shown in the upper left was made from  light gage aluminum and a small piano hinge.
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