Arch,
If I read correctly, you want to cant your mast. It's done with some frequency in the Farrier trimarans. The 31-1D is the more famous example.
The way it's done is to have textile shrouds with multi-purchase thimbles. Erik Précourt was in business doing that but he's recently gone. There are other people building such shrouds but I don't have experience with them. I have an F-27 trimaran and I have Précourt rigging, although I don't cant.
The shrouds themselves are Dynex Dux, and they run to a thimble which has Amsteel multipurchase line. I've done my own lowers on one side, it's really not rocket surgery. The canting Farrier rigs just take the tail or bitter end of the lower adjustment, run it aft to a block at the rear beam, turn it toward the pit, and thence to a cam cleat, it's really just that simple.
BUT... that said... one of the fastest Farriers in the country, GAMERA (Matt Scharl of the Great Lakes) has gone back to stock rigging, eschewing the canting rig. I figure if he of all people doesn't think it's worth it then it's not worth it, to cant, anyway. And, in fact, Smyth has never bothered with a canting rig on his F25C. These guys are FAST.
I have textile shrouds but I've never messed with canting (see above), and the main reason I've stayed with the textile shrouds is because of the ease of rigging since I rig each time I sail. Textile shrouds are super light and easy to deal with. If I left my mast up all the time I'd prolly go with Dyform stainless.
My bottom line advice... it's not worth your time and effort to bother with canting your rig AFAIC. If you want to lighten and ease mast raising type stuff then consider textile rigging but be aware that the fibres do take some time to settle. People confuse this with creep but it's just fibre alignment. My F27 took quite some time to settle in and I have a set of textile rigging for my 18Sq that hasn't settled in yet (mainly cause I've not been sailing her
If you leave your mast up and want to lighten, just go with Dyform wire
sea ya
tami