@mark49152
I didn't at first... but I do now. The first time I tried putting a lighter lube in it (25ct shock oil) it felt horrible. Had to disassemble, clean each piece, and try again. Heavy lubes seem to work very well in the BoChuang. A pretty decent smattering of traxxis 50K at lots of different contact points is my usual routine now.
The center caps thing might be a defect... and I'm sorry to hear it. I hate the idea of gluing my caps down, because I might want to get at the screws later. But since these caps hang over other pieces a little more than usual, I can see how it could become an issue. You might also fix this by tightening it, but that's just me wishfully thinking out loud.
I remember AoChuang lockups well, but never managed to cause them on my Yuxin. And I think tensions made the difference. I had to keep my AoChuang a little loose just to speed it up, even though I knew it increased my risk of lockups. But on the Yuxin and BoChuang, tightening it didn't take as much mobility away... and it definitely helps prevent nasty lockups.
Maybe try small amounts at a time. Like an 8th turn of the screw on each side at a time... or less. Just get it to the point where your lockups stop being of the "nasty" variety and instead will snap back into place by just undoing the turn. Hopefully, by that point the overall feeling of the cube won't be gone, and you can start getting used to the newer feel, confident that if you lockup at all it won't completely ruin your solve.