One thing I would add, is that after you get it loose do some investigating to determine where the binding occurs. Some days I go back and forth between several attachments, changing every few minutes.
If they were to get stuck on every time, not only does it slow things down, but you get tired out fighting it. My pallet fork is probably the worst. In its case, I have to be very careful when I put it on to be sure it is centered almost perfectly on the Bobtach. Some day I will probably wided the holes in the fork.
I would not make any modifications to the Bobtach unless you find something bent or binding that needs attention. Good luck.
John