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@gbj_tester
Presumably that adaptor slides over the lobes on the hub, "bottom" as shown in your pic to the outside and sprocket (suitably cut away) mounted on the "top". Initially I'd have thought there was a material risk of the chain hitting the spokes, but I have 13mm from disc mounting face to the elbow of outbound spokes, you're using half that to get your chainline to 46mm so as long as you're not using a Wippermann 1G8 chain it looks OK but tight.
I get a 46.3mm chainline with a symmetrical 4mm thick ring on modified UT cranks, if you're not going to modify the cranks I think you'll find the chainline with a symmetrical 3mm thick ring is 45.8mm. UT road outer rings are dished to give a 47.3mm chainline on the outer ring.