You're welcome. Once you transfer the BTC to a new address, it will separate it from the BCH. It had to be on the Trezor address at the time of the fork. That's why that guide says this:
from your TREZOR Wallet, assuming you had bitcoins (BTC) on your TREZOR before August 1st.
You can transfer your bitcoin to the Trezor just fine. Once that's done, get all the privacy keys involved in Electrum wallet (hopefully all the BTC was on one address to make it easy) and then import those to Electron to get your BCH.
Yeah that "assuming you had bitcoins (BTC) on your TREZOR before August 1st" statement kind of threw me when I first read it. Alas my BTC is on five different addresses but, and pardon me for being a little thick headed, what I think you are saying is it's ok for me to send all of my BTC to my Trezor right now (probably send everything to the same address). Since my BTC is on my offline Electrum wallet I have to do the 'create transaction' on my watching wallet and then go to the offline wallet to 'approve transaction' for all five addresses and send them to my Trezor. Sound right so far? Then I'm gonna kick back and rest my brain until tomorrow when I will switch gears and follow the Trezor guide (link in my original post).
I did download the Electron Cash Wallet, started it, it came to the window first window asking about selecting a server and, at that moment someone walked in and I got distracted and I can't remember if I killed the process but all said and done I went back to re-run it from my download dir and the file wasn't there any more so I kind of got a little panic attack! Any way it's slow and steady as it goes for me in doing this!
Following the Trezor guide won't help you since your funds were not on the BTC addresses controlled by the Trezor private keys before August 1st (right?). They are on the many addresses you mentioned.
Also keep in mind you may have Bitcoin Gold or Bitcoin Dimond (and who knows what else) on those addresses as well. Good luck. As long as you always have your private keys (and backups of your private keys) you can't mess up too badly since you can always start over again if you get stuck.