That's a pretty damn interesting project Colonel! Is the item shown the converted No53? It's pretty good if it is. Did your fitter man machine the tube down so that it'd fit into the No32 bracket cradles (the No42 and 53 are .018" oversize) and did he re-engrave the correct markings onto it.
It looks to me that those fitting the weavers scopes to No4T's have got precious little eye relief and thgose big brass eye cell retaining rings certainly know how to split your eye brows open........... but only once!