Personally, I'm convinced there's a connection between Fan/North Vein Flats and CCHL. Perhaps I'm just chasing rainbows....
There are connections with the North Flats.
Going west there is a branch to the left off the high level, the 'water incident' in my write up, that all went down into the north flats. Also a sump on the left going east just before the neck deep water. I recon that would have been a continuation of the rise in north flats blocked by the giant stal, or maybe blocked calcite ladder. No way on though.
As I said its been years since I was last up there or even thought about it all. The write up is pretty comprehensive if you can place exactly where you are in the descriptions.
If you want an easy route up as an alternative to Archers Rise, there is the 'water incident' one but I think far too dangerous?
If Hebs around he has done more SRT investigations up there.
My avatar is a poor likeness.