Compak R120 & vintage theatre spotlight

Before going to sleep I noticed how the vintage spotlight that Tije fixed for me lights the huge R120 grinder very well when all other lights have been shut off already. I took out my camera and made this picture (ISO12800, so dim was the room!)

Thank you Tije! Below is a video of how he made me the coupling piece that enabled the vintage theatre spotlight to fit on the expandable bracket, also from an old theatre but of a slightly different size.