Kinda surprised this is turning into an old guy thing. I got started with watercooling in the 90's. Some of you may remember DangerDen, who would machine cpu waterblocks out of copper blocks. I used one of those with a repurposed external radiator(from a beer cooler setup) on a Celeron 300, and got a slightly better than double out of it. Gave up watercooling for quite a while, until recently. BTW anryman, hell of a job.