As far as I'm concerned these stand-off single foot guides are only fit to be used on rods light enough to require their weight saving, and which might be adversely affected by the stiffening effect of double footed rings. In terms of specialist coarse fishing that means they have no place on any rods! The only other reason for fitting them is to save money and time. I recently built a carp rod with single foot rings (because that was what the customer wanted to match hsi other pair of rods) and they took no time at all to whip and varnish compared to double footed rings.
Just recently I've been getting a few non-standard handle requests. Most have been straightforward things like full Duplon with various reel seat options. One set has been a bit different. Minimalist in the extreme. It's a long, long time since I whipped a Fuji plate seat to a rod. I'm not convinced they are really as suited to the slim blanks used today as they were to the fatter fast taper glass blanks of the 1970s and '80s. But they do have a certain skeletal charm.