I built my own using that article.
I got a big heat sink out of my computer parts and used thermal paste glue to stick it on.
but I only drive 2 gauges.
I have also noticed with the advent of usb chargers, you can get a pretty cheap 2 amp charger now.
if you can take one apart, you could rewire that as the vr for the gauges instead.
http://www.bhphotovideo.com/bnh/controll...=details&Q=10 bucks. you can find them cheaper if you look.
building one was about 5 bucks.
RTE is like 25 or 35, I don't recall.
just depends on how handy you are and if you want to save a buck.