Mainsheet Bridle Height

[Zachary Kyritsis]

I watched the North webinar on tuning and they mention the bridle position for different wind conditions. The guideline being usually adjusting so that the top leech telltale is just stalling. Is this adjustment the height of the aft block (circled in orange) or the height of the split in the mainsheet end (green)?
Does anyone have recommendations on setting a baseline for both block and split heights?

[Peter Beardsley]

It's the height of the orange block.  If that bridle is too loose, you'll "two block" with the rest of the aft purchase and if that "two blocking" occurs too early, then in windier conditions, you won't be able to trim hard enough to generate leech tension. 

[Zachary Kyritsis]

Thanks! So is the mainsheet split typically attached at its full length? Or is there care to be had in making sure that is at the correct height?

[Peter Beardsley]

Tie the back part such that the split tail barely goes into the aft block - you don't want it locking up the block by letting too much of the splice through, but if you tie it too short, you'll add leech tension before bringing the boom to centerline, which isn't desirable in light air.