Switch which default style, retain member choice?

[TutorialForums]

Hi -

I'm trying to change one of my secondary styles to become my Default style.... well doing that alone of course is very simple... but I want to have it so that members will retain their style selection (i.e. those who were using the "original" default style will still use it, those who were using the secondary-now-default style will still use that). When I change the style as is, now all those who used the original are using the new, and all those who were using the new are using the original.

Actually I ran into another problem as well while messing with this - now if I upload either of the styles, trying to return things to how they were before, it changes BOTH to the same style, no matter what.

Anyhow - hoping someone can help. Worst case I guess I can reset everyone to use the new Default, and let them re-select the style of their choice....

Thanks!