It’s quite simple really. You see as it exists in many communities the elected representatives choose the members of the re-district board.
But let’s do it in random fashion. Set it so that the following conditions for selection are used:
a) You must be a registered voter.
b) You must have voted in at least the last three general elections
Simple rules – then for selection the following:
9 member redistrict board. Board comprised of four Democratic voters, four Republican voters and one Unaffiliated voter.
If we did it this way there’s no chance of districts favoring either a Democratic or Republican candidate through gerrymandering. And because it’s a random selection good luck buying the members of the re-districting board.