I have both, TBHs and Langs. I like them both, to me it is easier to get the honey from Lang's, extract. With TBH you crush and strain. But that's just whichever.
On my TBH I made frames, not just the bar. I had started with bars, had a cut out so made frames, easier to tie comb in. I am just a hobbyist. I have thought about doing a TBH with Lang frames, except make the top bar wider, so the bees wouldn't go above the frames. This is one thing about beek, you can try whatever you can imagine. Just give it some thought first. There is an old commercial beek in my local club that told me I was crazy for using foundationless frames in my Langs. They weren't all but about 40 to 45%. I didn't bother telling him I had TBH's also.
Yeap, I did it again, got to rambling. Good luck to you and your bees.