It's not so much a particular model that I am talking about. I can fix things by looking at the errors that Rhino sees and change them in Moi. I was just wondering if I can tighten up the tolerances in Moi so it's harder to make a solid? I was trying to figure out a way to use the deform tool as it seems to be the thing affecting the models. so lets say I bend something with the deformer, I would want it to be a set of surfaces (rather than saying it's a solid) that I could repair in moi without sending it out of the software to find the errors. Or should I just quit fooling with it and just build the object without the deformer?