On Sat, 10 Mar 2018 09:13:23 +0100, Emanuel Berg
wrote:

John B. wrote:

Although admittedly the Henry James "hold
everything" fixture is probably faster if you
are churning out quantities of frames.

What workstandish tools and stays should you
get to hold tubes? I have all the everyday
carpentry clamps and so on, of course, but they
hardly give that kind of confidence.

If you are talking about a frame building fixture then see:
https://tinyurl.com/ycns6zu2

--
Cheers,

John B.