Is it possible to upgrade and downgrade JSS (just in case)?

Contributor III

Hello everyone, I am still with JSS 8.1/OSX Server 10.6.8 (perfect!) and being testing 8.31-8.4 in the last weeks.
I have not found any major issue with a couple of 10.6.8 test clients and would now really like to move to 8.43 to support Lion clients.
Production with some hundreds clients is always a different story and would like to know if I would be able to downgrade back to 8.1 if I keep a copy of the last 8.1 database. It would not be a problem if I had to go back in time reloading the previous DB.
Is there a way to uninstall the JSS to downgrade it, just in case? Will then clients download the 8.1 components over 8.4 ones ?
Many thanks for your support as always.