A couple of things for clarity.......

First, *I* (OP) didn't suggest any HF torque wrench. It may be just fine. It's hit and miss on stuff like that. I'd suspect the error isn't horrible, but who knows.

Second, suggesting that the Ritchey tool is off by any particular amount would suggest that you even know how the thing's built/engineered. Not that it isn't safe to assume it has error, I just think it's probably not the wisest statement to know it's a half nm or full nm whilst armchair quarterbacking the situation.

Again, I think that 5nm on a 6nm torque spec (the only one I'm really concerned about) is just fine. I've checked the torque w/ a hex key afterward by loosening/tightening and it's certainly as tight or tighter than I'd put on a bolt of that size by feel.