It will just be an account setting that can be set on a band new, unused account.
You wont be able to swap things back and forward - ever.
All the mining will be the same - same miner settings - same HIGH quality and PROPERLY managed servers.
No lost MULTIPLE blocks due to NEGLIGENCE like the Derp pools.
Same fee as the rest of the pool 0.9%
It will simply be, if you find a block and the account is flagged as solo, it's a solo reward.
KDB is of course full of up coming changes about this to separate everything - hash rate, rewards, finder type etc.

I've listed all the details in discord a few months back, and will post them here when it's ready - prolly in a few weeks.

Now back to working on this payout+dust today for all the current miners ...