I'm new to the 12 (foiling moth for the last 2 years). I can't get my head round the idea if transom sheeting. I buy the idea that a bridle at the back gets the main in the centre but would still want to lead the sheet along the boom and then down to a block aft of the thwart. That leaves the problem of getting the tiller extension thrrough. How about twin ectensions? Help appreciated:-/