You could just download the wallet on a VM and then delete the whole VM when an exchange you use is added

If that's 'safe' I might give that a try ..
Could you aim me at a tutorial that explains how to do this ??
TIA
Triff ..
If you have never tried a virtual machine then I wouldn't start now.
You mention the word safe, most wallets are 'safe' to download. I have several wallets running most of the time.