
Thanks for the comments guys.
My concept of the 'fiducal' lines was to indicate settings for the more common tapers used i.e. 1,2,3, MT perhaps 'indicator lines' would be a better description (symantics?) I agree with your comment about different lengths producing different tapers but these lines would only indicate standardised 1,2,3, MT lengths & I don't foresee myself doing anything other than common tapers

so a couple of lines set up from either side of center line would be a helpfull quick ref. If you want to create a 'spot on' taper you can always set up a master taper in the headstock & set your compound slide using a DTI, or if you are really clever you could use 'Trigonometry'

to calculate the offset, mind you I would simply use the taper charts from 'Zeus' if I needed to be that accurate

Am looking at posting more pics this weekend so bfn
mechman48