Yup - I was looking at those too.
I was thinking of doing a totally seperate system for the G4 and maybe smaller hoses and lower flow...
This block look pretty cool and doesn't take up a lot of room...

I want something that works well and don't know about this one yet...
Not sure how many watts of heat there are to deal with here...anyone know the wattage range and if small hoses/flow would work?
I visited Bladerunner's site (thank you) and noticed he hasn't even completed the block yet, so it will probably be a while b/4 it's being marketed...

No sign of his products for sale either...