May not have to have a welder, but have to open your wallet wide. The transdapt mounts came out well before Schumacher and were probably the pattern that Schumacher used for the 67-72 k-member. I've been building Direct Connection k-members for over 20 years now and it doesn't take much time (maybe an hour). No problem getting them in the right place, either.
The problem the OP is having has nothing to do with wrong selection of parts, perhaps wrong installation. The fact of the matter is that no matter which mount solution you use, you can run into problems and what I explained is the answer to problems with any of them.
