Glad you are back (and your back is back). Are you indicating to us that you cannot get your 3pt attachments welded elsewhere either? Also, I have a local welder with a truck/welder and he will come to my place to weld if needed.
I have the Deere I-match which is very similar to several others (see pic). The changes I have to make are mostly to the top hook, as the attachments don't allow the room needed to slip that top hook up under the top pin. The lower pins are pretty good, but need some fine tuning for the right width and the correct bushing diameter.
I don't find the need to go to the adapters that are added to each attachment to conform to the quick hitch. They seem to be a bit pricey, but worse they add weight and length to the 3pt, which I don't prefer. I sure wouldn't want to be without the quick hitch. Sometimes it feels like a stretch from the seat to reach the levers that lock the quick hitch onto the lower pins, and that may be tough to do with the back - but a short walk to the rear just to flip levers isn't as bad as wrestling with the attachments to line them up.
Would you be able to post some pics of the attachments you want to adapt to the quick hitch? Maybe TBN members can offer some tips to make the changes. Critical would be the distance between the lower pins, and the vertical height of the top pin from a line between the lower pins. Plus, as I mentioned before, the room for the top hook to come up under the top pin.