We are using a DIY 'EZ' jack setup that works well for us. We have a 1/2/4 setup with the 1 and 2 part in cord, and the /4 part in shockcord. The /4 section is a single piece of shock cord with a hook at either end. On either side of the boom we have 2 padeyes and a central hook used to connect the shock cord sections to the boom to set up the lazy jacks in place. The ends with hooks go to padeyes aft on boom and at the gooseneck, and we take 'bight' between the /2 part eyes down to the central boom mounted hook.
Once doused and with the sail ties on, we disconnect the shock cord sections from the boom and connect the works to a single hook connected to another section of shock cord on the cabintop rail either side. This keeps the system off the sail (most of the time) and off the mast. Being shock cord it has enough give when the main is eased and there's no sail distortion at all.
The plus side is, like you've mentioned, no interference with the hoist, no slatting on the mast when stowed, and no mods to the sailcover. Downside is that it's an 'extra task' prior to dousing the main, but we've become used to that. The other plus is the cost... a few inexpensive padeyes and hooks and the shockcord.
Hope you can make sense of the above.....
Here you can see them in place (If you look closely)
Here they are shown stowed (well off the rig, as you can see....)