I think the locking ring on the lightforce is a pain...but its not going to change in a hurry unless one of us pours a heap of cash into O/S trips & a fair bit of research...
It took me about 2 years to bed mine in--i had to drive around with the setting just past tight enough to hold the light in position when you let go & psych myself through the cramp...that took 6-8 months to get the stamina in the wrist.
Eventually it seemed to wear in & all the settings were perfect...everything stayed put when i let go & got no cramp, so i was happy for about 6 spotlighting jaunts (for me thats probably 12-18ish nights).
Then the light started just blacking out for no apparent reason...after 10 months of it randomly blacking out it did it as i was about to shoot a cat..then i lost 2 foxes due to random blackouts.
...so that was it...!!!!!
Took it back to get checked & left my basically brand new unmarked red filter on it.. .(i try to look after my light--ive seen the ones that dont get looked after & they are bad...i even keep my filters in the plastic pack they came & pack the light in amongst all my bedding when i travel).
When i picked it up the report was something to the effect of 'left in turned on for 10 mins, shook the light & no fault found'...
Went out to test it only to find all my bolts/nuts were loose, everything flopped around so i had to go back home, & go out in paddocks over all different terrain (flats, hill etc) with spanners & screw driver to get all the angles back as they were, except that...
...one of the suction rubbers had somehow been torn
so it wouldn't stay on the roof...(sigh)...
...after putting new connectors on it, when i plugged it in & turned it on, it blacked out immediately...
...and the face of that brand new red filter i left on...?...well the first thing i noticed when i collected it was that it looks like it got towed behind a truck down a dirt road for a mile ffs...
I dont know what they did to the light, but its pretty clear to me that my as new light got thrown around pretty roughly...i really couldnt believe they would treat peoples gear like that
...i managed to get the rubber changed for nothing but i refused the offer of leaving the light there again.
So no Roofarmer, you're not the only unhappy one...although im happy they didnt screw me for the rubber suction cap...
But, my experience tells me that there may well be a sweet tension spot for that locking nut, & if you find it, just nip it up that little touch further, leave it there & it will eventually bed in & become comfortable.
The man who knows everything, doesnt really know everything...he's just stopped learning...