As long as you are using high quality equipment and not cheap stuff from Ebay you should be fine quality wise. Ofc, it also depends on the resolution.

I've used a similar setup (with splitter to my main computer for VGA capture). Here I noticed a major quality difference with a highend VGA splitter and a cheap one from Ebay.

Yes, it should work fine. As above, output quality may vary depending on the quality of your splitter - a passive box will be worst, a good active splitter better.

One thing to bear in mind is that automatic resolution detection using VGA EDID signalling may not work, and of course if your two displays are different specs, well, you may have some fun and games. But that doesn't change the fact that it should work from a technical point of view.

Thanks guys, appreciate that. The kit is decent - Belkin KVM and a powered VGA splitter - pretty sure Mr Phil had a thread about a Star Tech VGA splitter when I was searching the forums earlier.

The CRTs are different max resolution (the Formac one is higher). The VGA splitter suggests using the better spec Monitor on the first input and also references DDC?

Thanks again 😃