THE SETUP:
-----------------------
PS1 --> Scart switch --> Sync Strike --> Vigatec FX2+ --> iScan VP30 --> HDMI to TV.
THE PROBLEM:
-----------------------
Certain games on PS1 (an NTSC-J PS One in this case) gets all jumpy and weird during very specific parts of the game. As in, the screen jumps up and down. Two games, in particular, where I've been able to easily reproduce this happening is Raystorm & Ace Combat 3: Electrosphere. In the case of Raystorm, the screen starts to jump right after the Taito logo and proceeds to do so, main menu & game throughout. Sometimes this doesn't happen and the game works normally, though.
As for Ace Combat 3, the main menu, opening movie, story scenes & briefing all work fine. However, once the game starts and you're actually flying the screen starts to jump. As opposed to Raystorm where it sometimes would work, this seems to happen every time without fail.
So for this problem, I consider Ace Combat 3 the ultimate benchmark
I'm thinking it might have something to do with my Vigatec FX2+, since the game works whilst directly connected to the TV and the VP30. I thought it was some kind of sync problem so I replaced my ghetto RGB/S solution from my scart switch to the Vigatec with a Sync Strike and yet the problem persists.
Not sure what's happening, is there a resolution change or something that causes this?. Outputting from the Vigatec to the VP30 (or TV) through component (sync on green) or through RGB/HV yields the same results.
I'm at a bit of a loss here
On my list of things to get....sometime. 
