Here we have it from start to finish.
Cost: $ 38.80 ( I already had most of the steel, Lester contributed the top plates & bolts...the bartering system

)
The RHS is 100X5mm: with only 750mm above ground, this will be ok.
No more moving the damn tripod in & out for me!
Testing will commence tomorrow night & if it needs no alterations, I will top coat it.