I posted this pic last year. This is about as far forward raked as I can get. I think that there is only 1 lower hole left on the bridle.
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I think that I am running closer to Tback although not necessarily by choice. I should be going MAST UP next weekend. Weather helm wasn't an issue so I guess I can experiment with raking farther back. For science sake. But I do remember that there isn't much room before I blocktoblock.