Ah, yes, the extra clearance and walking foot was what sold me. It was £200 so not dirt cheap, but they are not easy to get hold of at dirt cheap prices.
It’ll do medium to heavy weight (I believe it’s described as “an introductory leather machine”) so I can set up the 96k49 with the roller wheel, the 31k47 for more heavy work, and use the 31k15 as a hand crank/spares.
Base off 31k47 is prettier. Table off 96k49 is tidier, all three heads fit in the same aperture. And new servo motor and belt to go on. Sorted