Check out "Jiffy Jax" on google. I just installed them on my Cat 30 and I think they are the best thing since sliced bread. They retract so they fit under your sail cover, and they can be ordered (like mine) to be deployed from the cockpit. Once the sail is dropped and strapped, retract the lines and they are out of the way. Comes with great materials and easy to follow instructions.
My boat is equipped exactly this way, except only two lines per side, and I see that really need three. The idea of deploying the lazy jacks ever time I take the cover off, then putting them away again is what I don't like. I have to put bungee cords on the lines to keep the shackles or rings from banging against the mast in the wind. The topping lift on my boat is a poor arrangement too. I need a new sail cover. So what I plan to do is eliminate the topping lift, deploy the lazy jacks permanently to hold up the boom, and have the new cover slotted to close around the lazy jacks.