Thanks for all your help and debate on this subject guys. I've learned quite a bit and shall be applying all the suggestions to see what works best for me. BTW, my modelling package of choice is Rhino 2.0. I don't know if many people use this (probably because it specialises in NURBS, so I have to convert before exporting) but I'm comfortable with it and it does run okay on my ANCIENT PC (Can you believe I'm still working with a Pentium 166? Need to sell some models soon, I think...) Thanks again, I'll keep you posted of how I go...