Just a quick tip for those who don't know it already.
To get an accurate dimension between the "Vee's" ( the 47.98 dim in the above sketch )
Lay two bits of 1/4" diameter HSS toolsteel or something similar in each Vee, then take two measurements, one inside the round bars and another outside of them, adding the two together and dividing the result by two will give you a much more accurate dimension than trying to fit your digital verniers across the Vees.
Also, the relationship between the 47.98 and the 3.7 dimensions is very important so as to make sure the clamp works in the same range as your existing toolholders.
Sorry if I am teaching granny to suck eggs.
Here is a parting toolholder I made for my miniature Dixon style rear toolpost on the Myford, using the method described.


Here is the drawing to show what I mean.

Phil
Edited By Phil P on 08/12/2019 12:22:49
Edited By Phil P on 08/12/2019 12:38:22