Thanks for the replies.
I find building as best to dish saves time as otherwise am constantly removing wheel to check.
The frustration is that the act of removing the wheel to check dish then alters calibration upon re-installment, thus wasting more time trying to gauge which way and by how much to compensate in order to get alignment.
I also build to the high-tension side then drag the rim across…..
Have now purchased a DTS jig which is slower to set up, but is much more solid, and gives reliable repeatable results.
Agree with the comments about mass production- must admit I like quality and think that also reflects in work undertaken. 🙂