Very happy with my Durst 138S cold light conversion. Michael Mutmansky set mine up last Aug-Sept. Besides the floor mount it can also be bolted to the wall with right angle irons from the hardware store. Here that is a concrete block basement wall so I don't anticipate much movement. At Michael's suggestion I added the RH Design StopClock Vario that has a sensor to tame the cold light. I had to fabricate a frame to hold the six inch filters under the lens.