I stand by my general statement. Even an 0-4-0 will encounter a curve it cannot handle without larger treads and flanges and really wide drawbar and coupler swing. A video of a very nice model on 36" radius does not disprove my general statement, and says nothing about a rigid wheelbase.
I do not have any 36" radius track, and am mainly interested in scale couplings - I do have a number of locomotive with one piece side rods, although I have had castings done with full clevis joints for my more recent efforts. Stevenson has the masters, and they are as good as the CLW rods.