Little surface gauge-H.Hall design

[Xldevil]

Hello.
I´m trying to improve my skills and bought H.Hall´s book:Lathework-a complete course.
For my first project,I´m building the little surface gauge.
Now that it comes to the cut that has to be sawn in the base as a part of the adjustment fixture,I´m wondering if it´s meant to be circular or just at one side.The drawing and the text is not that clear to me.
Did anyone build that gauge too and can give me a clue?
I´ve found to pictures of a finished gauge:
http://images.google.de/images?q=surface%20gauge&um=1&ie=UTF-8&sa=N&hl=de&tab=wi
Last row,the one at flickr.com.with the round base.
The V-groove, that is meant to camouflage the unsightly handsawn cut,is going all around;but I can´t see the sawn cut in itself.
Anyway,here are some pictures of my current progress:



The base is turned already.Trying to level the base for flycutting the flat and drilling the holes.





Holes drilled,than deburred.

Turning the necessary thin piece collet.

Cheers,Ralph

[No1_sonuk]

The cuts are straight across, leaving a 2mm piece of material to act as a "hinge".

The top, right drawing on page 19 is a cross-section through the cut, and shows the 2mm piece with diagonal hatching lines.

[Xldevil]

The cuts are straight across, leaving a 2mm piece of material to act as a "hinge".

The top, right drawing on page 19 is a cross-section through the cut, and shows the 2mm piece with diagonal hatching lines.

Hello.
You don´t waste any time to exchange pleasantries.
Anyhow,thank you for your help.
ASFAICS the cross section drawing shows only one straight cut on the left side.If I got you right,I have to saw 4 straight across cuts,one on each "side",correct ?And then there should only last a hinge of 2mm in the middle of the base?
Regards,Ralph

[No1_sonuk]

Hey,

Looks like 2 cuts to me, one shallow on the left, and one very deep on the right.  The 2 "ends" of the hinge are formed by the initial turning of the groove.

[Xldevil]

The brass to make the adjustment bush is on the lathe

[Xldevil]

Hello.
To come to an end,the gauge is finished.
More or less,the "fine adjustment" seems to be useless.Maybe I did something wrong?
Anyway,the making offered me some good options to improve my skills.
My next and more demanding project will be a rear toolpost for my Super 7.
Cheers,Ralph

[Rob.Wilson]

Hi Ralph 


That looks a handy gauge 

cheers Rob

[Stilldrillin]

Very nicely done Ralph! 

That looks purposeful, solid, chunky........ 

Probably much more use to the likes of us, than my full size/ oversize one, made as an apprentice in 1960. 

David D