Well done. I have set-ups like this for all my tractors. (I bought mine, didn't have the welder then.) I have several trailers also, this makes moving thems so much easier.
Kubota L3710, Ford 5600, Case MB4/94, Kubota B6200
Looks like you'll get a lot of use out of it. Best of all, you built it so it fits your needs. I think a hitch adapter is one of the most useful tractor attachments a tractor owner can build.