Hi Michael,

>>MoI will only attempt to join together edges that pretty close together - within a maximum of 0.005 units

Hmmm... it is different than the Join command in Rhino... there it is a two times of global modeling tolerance, isn't it.
Could you include all of this "accuracy" specific information into the MoI's help file? I admit, most of users don't need to know that, but many Rhino's users are suckled on technical terms...
I remember you mentioned three kind of tolerance so far.
Global modeling: 0.001 units
Rebuild tolerance for Loft and Sweep with Refit option: 0.01 units
Joining tolerance: 0.005 units

Thanks,

Petr