Ok here is what I did, quick shots at best.
Just so you all know I don't have a full metal shop at my disposal.
Using hand tools like precision hack saws and bench top drill press for laths.
Had aluminum pipe 3/4" O.D. Cut to length 45"
And found some hexshape standoffs that fit inside of the pipe.
These were allready drilled and taped for 1/4-20 thread, great!
Used JB Weld two part epoxy to hold the standoffs at the ends, may mount
some flush head screws just for insurance so they do not come out or twist.
Bottom end standoff needs only to be mounted sense the foot of tripod
has a mounting stud.
Used a 1/4-20 x 1" set screw in the top standoff for the ball head to mount to.
Piece of water pipe insulation for hand cumfort.
I don't think I can do this for profit because Trek Teck already has the mods and better made than mine. I just did cheap impression to see if a PD was to my liking.