I've now got my V3 upgraded printer working and the prints look very good in deed. No more z-axis wobble; nice clean surfaces

However, I'm seeing some minor problems with dimension where the print size does not match the design size (I'm using Creo Elements as the design package). There is just a small difference, but enough to make the prints unstable at times.
Some differences seen
20mm = 18mm, about 90%
8mm = 7mm, about 87.5%
3mm = 2.25mm(ish), about 75%
So I suspect the actual size difference is around 87 to 90% mark.
Can this be adjusted in software?
Many thanks
Dave