MD1/MD2/SNK RGBS Upscaler

[RetroDave]

I recently bought a RetroScaler RGBS Upscaler on AliExpress to try on my CPC464.

https://a.aliexpress.com/_Ew9IUtm

There are other products without the RetroScaler brand that are cheaper and probably identical.

It's a nice compact RGBS to HDMI package without the clunkyness of the scart cable/box and much less expensive than RGBtoHDMI solution.

It's built for Megadrive and Neo Geo consoles but it looked like it would be compatible with the cpc RGBS output so thought I'd give it a go.

I built an adapter cable and it works well!

However, there's a black band down the left side of the screen that results in the image being pushed off centre.

Does anyone have any thoughts on why that is and how it could be corrected?

Other than that seems like a good solution for the cpc.