I have Bitcoin (scores of addresses) that have never been split.

I will probably over-complicate this, either because I waited too long or because I just over think things (sometimes!)

Up until now I have been been running full nodes (BTC and BCH). I am considering moving to Electron Cash (for my BCH). I have downloaded and installed the latest (4.2.7) Electron Cash version. I am interested in applying CashFusion to the majority, if not all, my BCH.

I am also looking to "split" those "coins" that existed prior to any significant forks; BTC/BCH, BCH/BSV, BCH/EC

BTC/BCH: I won't have any problem with this, since I can dump the private keys and import them to Electron Cash. Though I found that importing these addresses does not allow me to use CashFusion.

BCH to BSV/EC(BCHA): I have scores of addresses from before the BCH/BSV fork.

Do I have to deal with the BCH/BSV split first?

Do I deal with the BCH/BSV split and then the BCH/EC(BCHA) split?

Can I address both issues simultaneously?

I have reviewed a number of articles addressing the BCH/BSV fork and how to split.

(1) Deposit to CoinEx and let CoinEx split your coins.

Is this still an option with CoinEx?

Do they also split the BCH/EC(BCHA)?

KYC? How much?

(2) I am aware of other means in which to split BCH/BSV. My biggest concern is maintaining anonymity for these addresses.

"Receive dust (a tiny amount of already split and non-replayable BCH) or sign with Schnorr"

Is "sign with Schnorr" possible with Electron Cash v4.2.7? If so, where/how?