Hi, I think that you are in the same condition as me (look at
http://forum.avolites.com/viewtopic.php?f=3&t=6688)
I think that you must search for some dismissed old Pro Expert, because the Pearl Expert Pro is discontinued from 2019 and the upgrade kits are not available ( but maybe your local reseller had one old upgrade kit at home)
Before the upgrade of the console, the fader boards need some modify (some soldering and adding components and wires).
There is a document on the site where all this things are showed and descripted.
after that you need the Upgrade Kit (but actually is a discontinued product)
The official complete Upgrade kit from non Pro Experts to Expert Pro, if I'm not wrong, was composed from:
- a new motherboard with a new CPU and new RAM banks
- a special connection card to connect the Expert Wing
- an Expert Wing
- an UPS card that will replace the cdrom reader
- some metallic part to cover and protect the motherboard and avoid the fixing of the cables
But all of this is unavailable officially...