Thanks for the info. Can you explain what you mean by "connecting your Trezor to Electrum"?

Do you mean when sending to and from Electrum? Do you mean viewing your coins in some way?

I have my coins on Electrum at the moment and am happy, but wanted to get a cold wallet for added security*

[* To be honest, I have been astonished at the number of technical issues I see on their forum. I thought a cold wallet was all about just dumping your coins and forgetting about them for years? It looks like you need to check all is well every day, like a cat on hot bricks!]