No. Only the one upstream from the one that overflows. It doesn't overflow. It was an addition I added to try to solve this ones overflowing.
But, it did not change…

Interesting thought and reasoning, but I cannot visualize what you are suggesting. Any pics of this?

Interesting video.
Maybe I need ti look at raising the leaf guard also if I can. I could possibly only get about 50mm though.

So I cut and raised the angle of the base of the downpipe today, so the fall from the bottom of the downpipe elbow now is around 80mm,to where it…

Yes they are.
The internal mesh is a lot finer, about 1mm.
I am going to cut down pipe later today, and lift the elbow about 80mm, as the run from the…

The one shown is the one that used to be the closest to the tank. Now it is the 3rd from the back, 2nd from the front.
I will have to…

Have you tried downloading the user manual and look at the troubleshoot section?

I have an on-going issue with one, and only ever the one down pipe on my house
Aa owr the picture, under heavy rain, it always pours water out.
I have…

That looks like water ingress between the panel and the tile.
If ingress is getting down between the joint, it would not necessarily mean poor waterproofing. The swelling would need to…

Looks to me, to be more corrosion of the screen/frame than any leaking.

Couple of close up pics of what I have.

I have Gal hoists, no affect there.
I just chipped dark area away, and I basically get a 3mm deep strip, and a single hole through about 50mm.
I was thinking of…

Thanks for reply. Looks like there is a small section of wood rot up under the wall.
Cut out 200mm etc and replace?

I had a leak under the tiles in my shower.
After pulling up all floor tiles, i found a few small patches of timber rot in the board base.
After removing all…