I was already over the moon picking up this super clean "Vectrex plus games" for £90 from an auction. Imagine how delighted I was to find that "games" was 8 boxed titles and a boxed spare controller? Deal of the Century for me!
On the Aliexpress MVS sync is straight from the main board. No attenuation whatsoever (output is 5V TTL). You can replace R51 with a 620 Ohm resistor and that will bring down the sync to ~400mv.
@turfmasta Is the NeoSaveMasta a retired product? Do you have any more runs planned? I bought a 2 Slot cab yesterday and your card would make for a great addition. Thanks.