I get my modded AV Famicom back on Tuesday. Excited to see the results!
Thanks for responding.
I have an Extron Crosspoint 450 Plus 128.
http://www.extron.com/mobile/products/product.aspx?id=crosspoint450plus128
Already set up and it's amazing sending any console to any monitor, any audio output, or multiple ones. I contacted the guy at the review site and he told me about the s-video adapter you mention. The matrix switch has no dip switches but connecting the adapter to G (Y) and H should just work. This thing is a beast and takes RGB, Component and VGA without a problem if the output display can handle it.
I'm waiting for scart to BNC breakout cables for a few consoles still connected to a scart switch. I do have that switch on an Extron input for some amount of flexibility.
The biggest pain was looking for RCA to captive screw adaptors for plugging in audio:
http://media.extron.com/product/img-md/csr6.jpg
The few premade ones are expensive,$25-$30, and hard to find. I made my own with Extron's instructions. I do need to use better 3.5mm to female RCA cables for making these. The bunch I got dirtcheap on eBay did the job but have audio buzz if volume is high.
If anyone is interested in getting one of these, they're cheap on eBay, much less than the available good scart switches and built like tanks. Make sure you're getting all the connections on the back that you need. The standard models all have the same button layout in the front for input and output, but may be configured for less. Crosspoint 128 means 12 inputs and 8 outputs. An 84 is 8 and 4, etc.
Also if you're worried about the age and hours of this equipment, the Crosspoints that have Ultra in the name are the newest, followed by the similar looking Plus. Both say "ultra-wideband" on front of the box. These have large white buttons with numbers on them. The older models have smaller plain black buttons. This initially threw me off because at a glance the new models look very old, but in person the buttons look good, have a pleasant click and fully light up.