Hello Julian
I remember the first time I wet the bottom of Mary Ann, that was six years ago, and I still have not stopped grinning.
Regarding the rigging tension, the shrouds should be tight enough so that the lee shroud does not go slack when the boat is pressed hard. I achieve this tensioning the forestay until the shrouds go "twang" when plucked.
The first time I rigged the boat I adjusted the length of the shrouds so that the mast was vertical, I then wired the bottle screws so that they would not move, they have stayed like that ever since, all subsequent tensioning being done with the forestay.
The bobstay tension is not important, because it is automatically set when you tension the jib/yankee luff.
The bowsprit shrouds should be tight enough to prevent the bowsprit moving laterally, again the lee shroud should not go slack then the boat is hard pressed.
I hope this helps.