It might be a little less impractical to make something that would be difficult to buy, either because it’s rare, expensive, or has never existed before - S_J_H’s boring mill, and Jackary’s ‘Stepperhead’ are great examples:
Cnczone boring mill build thread
http://www.lathes.co.uk/stepperhead/...
The two mini lathe beds I have, both made by SIEG but many years apart, have the angled surfaces of the vees at different heights compared to the flats, which makes it so that parts aren’t really interchangeable between them.
I can’t tell from the LMS cross section drawing here...
What kind of machine?
On my little, non-model, bed-type mill (and sometimes-lathe) the major parts are just gray cast iron, but it’s really little! Like 4” x 3” x 2” travels, so forces and overhanging distances are very small, and more weight from extra material at weak points isn’t really a...