AutoCAD Inventor :: Assembling Parts With Multiple Bolt Holes

I'm trying to assemble two parts, each of which has four matching bolt holes.So I do a "mate" between a hole on one and a hole on the other.  This works fine, and the parts now behave just like two parts bolted together with one bolt - one can be rotated relative to the other around the bolt hole. So there is one degree of freedom left to be constrained.

But the obvious ways to constrain that one last rotational constraint result in overconstraint. Trying a "mate" between the circles at the ends of the corresponding bolt holes breaks the first constraint, and the non-grounded object "jumps". Trying to auto-mate the two holes results in the holes being constrained as tangent, with the holes not lined up. I've tried constraining the center points of the end circles of the holes. That doesn't work right either.

Doing the second constraint as "tangent-inside" does work.  That's a 1 DOF constraint, which makes sense.It took me a while to figure that out. The help files aren't very useful when multiple constraints are involved.