Thanks I'll remember that...
So rebuilding panel for 4.10 still best practice
Still some plug-ins from 4.8 won't work in 4.10 some merged with other, are depreciated or need to be upgraded to 4.10 but haven't yet
if you start with a fresh panel the plug-ins should work and you won't have access to ones with no new equivalents or don't work right yet. Right
(The distros shipping with 4.10 don't have access to some plug-ins (not in default install or their package manager yet)
P.S. currently rebuilding a LMDE-XFCE (using SWIFT distro, so can't actually call LMDE
thinking may get 4.10 from Sid now, instead of waiting on.