Thanks for the reply!
About the HD Retrovision cables. They provide a 5-wire component signal, so there is no SCART cable/connection involved. Not sure how they have anything to do with each other.
No, I'm saying don't buy HD retrovision cables, get Scart cables instead and have everything go through the Component converter box instead of buying specialised cables. That way you'd have one Component switch and one Scart switch, instead of two Component switches. It's preferable because everything can use Scart (and be converted by the Component box), but Component out on consoles depend on suspicious mods and proprietary cables.
HD Retrovision cables are interesting if you have only one console to plug to your TV. But as soon as you want to use more consoles, or unsupported consoles, Scart + converter box is more practical.
I like the component switch that you recommended, but I wish it had more channels. Do you have any experience connecting a switcher to another switcher, or do you know if that is a common solution for a large amount of component devices?
Daisy-chaining switch boxes should pose no problem.