It was 3:1 MA system, not 8:1, and I recall that the GRCS has 1800 lbs of lift, so 1800 x 3=5,400 -friction guestimate 400= 5,000 lbs... That tree would have stood up pretty quick if we had had 28,000 lbs ......
I was actually going to go with 1/2" double braid as the second line and save the heavier rope (in case it was needed for the truck pull), thinking that at 1,800 lbs, the GRCS would easily keep that rope to 20% SWL.. Another old tree guy was there and was dead set against the idea, so I went with the heavier line...
I'd guess the truck was pulling about 5,000 lbs as well (2,500 on each leg)
What was not shown on camera is that I did switch out the support line from just through the fairlead of the GRCS to the overhead redirect block. I had originally just snugged it up as seen, but the climber wanted more pull on that line, so it seemed best to use the block since it was already set up... I have bent those fairleads before..
The climber tied into a neighboring tree before the tension was taken off the original support lines, which were triangulated. IMO once those lines were triangulated and the tree stood up, the leaner was the best supported tree in the woods, but hey, it wasn't my life at risk...
That said, we did consider that the tree may have gone over backwards, but the stretch on those lines was only going to move it so far and the tree still had enough lean to make the going backward scenario near impossible..
It all seems pretty simple in retrospect, and I attempted to keep the, "this is just another tree" calm mindset during the operation. We really just took our time setting all the ropes up and found a climber that wasn't afraid.. He made $300 for about 1.5 hours work... Had my regular guy balk without even seeing the tree..