User:Mathmagician/sandbox

Using
 * User:Mathmagician/CzechSig (code)
 * User:Mathmagician/CzechSigSubst (dummy template for substitituion)
 * The following code in Special:Preferences

makes


 * Recommended
 * To revert any changes to your previous signature back to the way they were, so that your signature is not broken anywhere where it previously was appearing.


 * To use brand new pages for your new sig templates. There is no need (unless you want to) to go back and change your sig anywhere where it was previously appearing. I think it is sufficient to apply this going forward.


 * Additional option:
 * A construction like the following in your special preferences might also work -- although this could run into problems because there is a limit to how many characters you can put in Special:Preferences for your sig, so if this becomes to long, this construction wouldn't work.