I hate to say it, hOughy, but I don't think the totem tennis pole is up to the task!
I would probably agree with Sir Dystic... unless you want to go all stainless, I'd probably skip it.
The pole (the real pole, not the totem tennis!) is what diameter? and how does that compare to the mount head? I see the pole has a base plate on it...
'Scuse my ignorance, I'm not sure I know how the mount head is to work... I assume the first photo shows the bottom, and th second shows the machined face that engages the scope mount. Does the outer sleeve (looks like its held on with screws) slide off? Perhaps if you can explain that part I can offer something???
Of course, the bigger the diameter of the pole the better... rigidity is proportional to the 4th power of the radius (or diameter).
Al.