1) Open Electron Cash
2) Tools - Network - Server
3) Uncheck "Select Server Automatically"
4) Put this in server "electrum.bitcoinabc.org"
5) It will now show chain split detected.
6) ABC will be branch 4284c9d8b2
7) BCH will be branch 29e471c418
9) WAIT UNTIL THE BCH BRANCH IS AT LEAST 2 BLOCKS AHEAD OF THE ABC BRANCH. OTHERWISE THIS DOES NOT WORK. THE FARTHER AHEAD THE MORE LIKELY IT WILL WORK. THE CLOSER THE CHAINS ARE IN BLOCK NUMBER THE HIGHER THE CHANCE IT DOES NOT WORK. BECAUSE ABC IS CURRENTLY 22 BLOCKS BEHIND IT IS BEST TO SPLIT YOUR COIN ASAP BEFORE THEY CATCH UP
10) Pick a server in the BCH branch list and right click select "Use as server"
11) Go to the addresses tab
12) Pick a empty unused address
13) Right click and copy address
14) Go to send and paste the address.
15) Click Max to send all your BCH to yourself.
16) Click send and type in password
17) You will now see a unconfirmed transaction.
18) Wait for 1 confirmation on BCH.
19) Go back to network and connect to electrum.bitcoinabc.org and make sure you are on branch 4284c9d8b2
20) The tx you made on the BCH chain should not be valid on the ABC chain because Electron Cash uses nlocktime in transactions meaning that a transaction has in them the block number at which it was created and that transaction won't be valid on ABC until they hit the same number of blocks. So it can not be replayed on ABC until they catch up. If you make a ABC tx within that window your coins will be split because the other tx won't be valid until after they catch up.
21) Go back to addresses, now pick a different empty unused address. IT MUST BE DIFFERENT FROM 12
22) Right click and copy address
23) Go to send and paste the address.
24) Click Max to send all your ABC to yourself.
25) Click send and type in password
26) You will now see a unconfirmed transaction.
27) Wait till this transaction confirms.
You should now have your BCH on an address and your ABC on a different address.
Now for convenience create a new wallet in Electron Cash and call it ABC. Transfer your ABC to that wallet. Whenever you are on the BCH chain, that wallet should be empty, when you flip to ABC chain it will show coins.
NOTHING CAN GO WRONG WITH THIS METHOD BECAUSE YOU ARE MAKING TX FROM YOUR WALLET TO THAT SAME WALLET THEY EITHER HAPPEN OR THEY DON'T. ZERO RISK AT COIN LOSS. You can try splitting with this method as much as you want it will only cost you tx fees.
How all of this works with SLP tokens I don't know. When satoshis are locked up in SLP tokens they can't be send so I have no idea how to split them. Of course on the ABC chain they are no longer called satoshis but sechets.
This was a real bitch to get published because the copyright bot kept removing it because it had found the exact same post on reddit and memo.cash. Of course those were both written by me as well ....