Yes, Michael W, Hemingway do lots of very nice projects, but at a price. I get the impression that there is not an awful lot of work in building a Worden, but the downside is the cost, for which you could buy rather a lot of new Endmills.
On the other hand, I believe Professor Chaddocks device costs a lot in cash and a lot in terms of work building it.
There is a sort of copy of the latter on the Internet which only uses stock bar and no castings but will still require a lot of work to complete.
I have nearly completed Guy Lautards device, having purchased the drawings from him many years ago, subsequently acquiring the castings free from a generous friend. Snag here is that drawings from Canadian website and the need to make a pattern and get 2 castings made in the UK to keep cost down. Not a lot of work to do but need to engrave 3 dials.
Harold Hall's device is probably the best bet for not too much work and relatively cheap.
All seems to be make tools to make other tools to finish the project that you really want to do.
Edited By DMB on 20/04/2018 23:51:35