Just a quick thought. The strap lugs for those two camera systems are not interchangeable. Even though they fit, the Pentax 645 strap lugs will break and the Pentax 67 will fall on the ground. Lots of reports of that on fb.
You’re fine to use Pentax 67 strap lugs on the Pentax 645, but definitely not the other way around.
Just a quick thought. The strap lugs for those two camera systems are not interchangeable. Even though they fit, the Pentax 645 strap lugs will break and the Pentax 67 will fall on the ground. Lots of reports of that on fb.
You’re fine to use Pentax 67 strap lugs on the Pentax 645, but definitely not the other way around.