I'm replacing a few tendons as regular maintenance - Chinook tendons in a Chinook base. The holes in the tendon aren't quite aligning with the bolt holes. I'm off about 1 mm which doesn't sound like much but it doesn't allow the hex bolt to line up with the nut on the other side and the threads won't catch.

As there any reason I can't take an appropriate sized drill bit and straighten the hole? Don't want to do something that'll result in a swim.

Oddly, I've had this issue with all three tendons I bought which according to the stamped date are all from different lots.