Thanks Scott,
I own a digital 5 ton load cell (brand 'Dynafor') - and so had a means to measure the force I was applying.
I used a 2 ton 'lever hoist' (basically a ratcheting chain block) - which is what I used to apply force.
I ran out of time today but, I am having another crack tomorrow where I will ramp up the force to 8kN and maybe a bit higher.
Will snap a few pics for you...
Mark