i have upgraded my lotr from 4.1 to 10.0 it is very well worth the upgrade! new sounds, a lot of bugs are fixed and the biggest bug, the overheating flippers issue after long playing times is also fixed.
I also learn about the 10.2 le version after i upgraded to 10.0 so i recommend to upgrade to 10.2 so if you want to add a shaker motor in the future you can do so without changing them again.