Thanks for the info. Yes maybe next time a better scan would be needed.

I was hoping to leave it as an STL and use that for my cutouts but maybe surface modelling first is the right approach.

I have a newbie question as Im still learning the ropes with Geomagic. I have the below scan which Im trying to fix up. I have gone around it with the fill tool and most of it is good, this part here won't really work with fill however. What would be a good approach here to tie this in with the rest...