In reply to jsmcfarland:
> this makes no sense, someone draw a diagram!
It doesn't work as ablackett pointed out.
When you have lowered off from the lead there will be three wall-heights worth of rope/autobelay sling out:
1. From autobelay to ground anchor
2. From ground anchor to top clip
3. Back down from the top clip to the ground.
But there are only two wall-heights worth of rope in the proposed system.
1. The autobelay sling.
2. The wall-height length of lead rope out when the autobelay is allowed to retract.
If you wan't to assume the autobelay provides two of the three necessary wall lengths of sling you need to figure out how the big crab on the end of the autobelay sling to which your lead rope is tied gets through the ground anchor and all the QDs.