thanks, i'll look at both those options. Once I sit the mazda column in place I'll get a good idea of the length I needrally design keep splined each end escort column shafts and metre lengths of tube that's a good fit so you can lengthen them. re biva, if it's welded and painted neat it won't be obvious that it's altered. and it's not altering a factory original austin part. as an example mk3/4 escort columns are welded at the ujs under the dash to get the needed offset.
just had a thought i seem to remember car builder solutions do a 400mm shaft, worth checking.