Hi Hugues, thanks for the response.
I've seen the delete option in free scan, but after a few more hours I will be OK I reckon. I didn't find Meshlab too awkward to align, it's got a "fudge" factor like Einscan that gets you close. The only thing I did notice was the individual scans had artefacts outside the scanned object (turntable ring textures etc), but that'll disappear when I stop using the turntable. I'll try a free scan of the small parts as a double check. I've just been looking at light levels, and comparing the different res modes...and that was before I read your post. I did find the lowest res was picking up almost the same detail (letters in the casting)
My next step is try and convert the STL to STEP or similar. Trying Rhino, but not getting anywhere fast with this, and hopefully the CAD guys will update my Pro option that offers some mesh conversion tools.
I will re-read Dave's posts again.
Mike