Awesome, thank you! It’ll fit on top of the light I have pretty well, so that’s good to know. The studio LED I use produces great light output but the bottom isn’t flat so I set it on a roll of packing tape 
(it’s pretty flat, I’ve checked with a level but could be better.) My guess is I could tape the Negative Supply carrier to the light to minimize movement.
I’m currently using the Peak Design tripod inverted and that’s working really well but I just ordered that extension tube so hopefully I don’t have to adjust the tripod any higher.
Thinking about switching to scanning with Canon or Nikon. With Fuji I have to run Enhance Detail on every file to get rid of the weird squiggly texture Fuji RAW’s render in Lightroom.
Thanks again!