I did a search and came up with surprising very little on this topic. I read 2 threads that were helpful, but not any more than the knowledge I already have.
I'm looking to setup a cutaway rig, and the only design I can come up with that is relatively feasible and seems that it may be a decent option is as follows:
Buy an airworthy container, cut off the main and reserve trays, leaving only the harness/3 rings and cutaway mechanisms. Wear this harness UNDER my normal gear, with the 3 rings and canopy connected outside of my normal harness. The 2nd main would be deployed from a belly mounted (or held) d-bag via a standard pilot chute. Exit on my back, deploy PC, fly until bored, cutaway 2nd main, deploy standard main.
I'm wondering if anyone is willing to share their insight, any experiences, things to watch for etc.
FWIW, I am a Rigger in Canada (equivalent to senior rigger, not master). I intend to do this for any number of reasons. I'd like to jump a blown up canopy, see how it flies, or jump a smaller canopy, hook a canopy up backwards. Basically just learn, try, play, experience etc.
Any info is greatly appreciated as I would like to do this as safely as possible given the added risk of doing this in the first place. I'm also curious about legalities of wearing a second harness in this fashion.