I didn't get out to site this Saturday but I did visit on three other days during the week.
I installed the last 4 runs of the floorboard runs early in the week.
I then created 8 more runs and took these out on Friday.
Also, at home, I created the locking flanges I had been discussing for my cramping brackets.
I am finding that opening up the roof at the beginning of the day and then tucking it up at the end of the day - is a real bugbear.
So on Friday I thought I would try an experiment to see how much of the installation I could do from underneath without lifting the sheeting.
The reworked brackets helped a lot - I did not need to fiddle with both ends of pipe clamps.
Also the newly fitted side flanges worked well and the cramps no longer slipped.
I found it was best to place the runs from above by crawling through the access gallery and completing the fine positioning from below off a ladder.
I also screwed on the cramp flanges from below.
Then I was able to tighten the cramps and squeeze out any gaps between the boards.
I am hoping, that to align and screw down the boards, I can get away with opening a very narrow slot by lifting just two sheets.
I will see how this works out on Monday.
(I will also take some photos then)