Have had a new refurbished E20 sent back to me by Garmin after a mishap.
I had expected them to install the latest version of the OS software.
It's 4.2.
But on connecting it to my laptop via basecamp I see that I am invited to update to a higher number - I forget which one.
Should I go for it?
I always kept my old unit on a pretty old version of the OP after some nervous updates in the past.