Ah but, (me again!) the centre wheels have the screw which ISTC holds the entire connecting rod in place !!
For a tenner plus post, I suppose there must be some recyclable bits.....in fairness, it only needs re-wheeling, the boiler shortening to fit the 4-4-2 arrangement, the tender wheels replacing, some better less-crude couplings.....before emptying it all into the nearest wheelie bin