). Here are my main issues:1.) SCART switchboxes - Finding a SCART switchbox that doesn't have some sort of crosstalk interference, audio issues, or has very many ports is hard to find. Even ones I've heard supposedly don't have those issues seem to be models that are no longer in production. The first set of SCART switchboxes I got apparently were not fully switched because some systems interfered with the video signals on other systems when they weren't selected or even on (though unplugging them 'fixed' it). The 2nd set of switchboxes I got did not have the video interference issues, but 1 port would lose connections for blue and audio buzzed more than it did without the switch.
2.) SCART cables can be dodgy - I've bought various RGB SCART cables for different systems with varying results. Some were great, some didn't even work initially because of minimal ground pins being connected, and some had audio buzzing due to absolutely no shielding at all in the cable. Having to correct cables I'm buying defeats the point of buying them instead of making them myself (other than maybe to get a proprietary AV connector the system uses that is hard to find.)
3.) SCART ports can be dodgy - It seems that female SCART connectors can also vary in quality. Some are fine with a nice firm grip, some are ok with a decent grip, and others are extrodinarily loose to where if a connected SCART cable gets slightly bumped (or sometimes moves under its own weight) then you lose some or all of the AV signals.
For a while I'd wished I could banish SCART and uses regular RCA connectors and cables to route RGB and sync. Well I finally buckled down, came up with a game plan, and did it.
I uploaded an album of my work here: http://imgur.com/a/ckKRl
Now for more details (some of which are already in the album details).
I made a custom adapter for each console that would be using RGB. I took project boxes and had a cable going out of one end into the AV port of the console (this was usually harvested from a SCART cable I had), and the other end would have component, composite, and audio RCA jacks to route RGB, sync, and audio. From there I could route RGB, sync, and audio signals through standard component switchboxes (as long as they also had composite jacks for sync). I also made an adapter to feed the RGB over RCA into the VGA style DB-15 input connector on the back of my XRGB-3. I also removed the SCART port on my RGB-to-Component converter and replaced it with the RCA jacks.
For my particular setup I also needed another switchbox to route the video between my XRGB-3 (to HDTV) and the RGB-to-Component converter (to CRT). Turns out you can use a component switchbox in reverse just fine (use the 1 output as a single input for the video in from the other switchboxes, and the inputs as outputs to go to the display/device I want them to go to).
