Great question, but as the original listing from 2016 isn't there on rig talk anymore (I searched and couldn't locate it),,,,,I'm not entirely sure. In the listing, the guy detailed everything done,,,I might be able to find out if the original seller is still on rig-talk and shoot him a PM to see if he recalls.
Meanwhile, I'll try and find out what the SE mod entails. I do know that there is a '94 CAE 3+ (per the serial #) that is for sale on Reverb right now, and under the hood, it looks a bit different (Tranformer aside). (See pic below)
Maybe someone more in the know about these could chime in and shed some light
I'll post here if I can get clarity.
Thanks
Len