Fellow E70 owner here. Bought one for 130 euros some time ago (yay!), and now in the middle of converting the 3 built-in preset synths (8 voices per manual, monophonic for the 25-note pedal, all 3 assignable to one manual) to programmable synths with a decent interface. The E70 has the same filters and envelopes as the CS80, but digital (= stable) oscillators. Massive fun indeed. And (referring to an earlier post) one of the reasons the Chorus/Tremolo on the GX80 didn't confuse me :). Reading this thread, I was waiting for the first E70 owner to show up😇.