isn't the scan doubler part is what's important! The vga monitor driver in 3.1 still needed hardware to connect, right?
On using vga (31mhz) with amiga (15mhz) from the 23 pin connector...
there were/are several adaptors, the most common being the commmodore 390682-01
But there was/is hardware that actually take the 15mhz and convert it to true vga.
Scan doublers!