Wow thank you so much, your dedication is limitless ;) I had thought of these "trim" steps as everything seems so logical in this software. I was just wondering if I was missing a feature here or if there where quicker ways. But as you said it every type of modelling system as it strengths and weaknesses and that's why after polygonal modelling I'm now digging into NURBS. I'll wait for other pitfall to submit my model because when I said that I was discovering MOI I really meant it I've just played with it a couple of hours. But yet I do feel the power and above all the efficiency of this modeler.

Again thanks for your initiative.

neodreams.