. I bought this for a reversible heatsink I'm building. This aluminum block does its job as it should and so far my recirculation heatsink is working fine and this block acts as part of my transmission's fluid exchange chamber. A lot of people ask me why I'm building a reflector and I tell them to shut up, shut up and not think about it. It's what I do for fun and I assure you I'm not planning a "big break". Those reading this are probably trying to understand it too. C'mon, this is just a fun build, you're wasting your time trying to figure out why. No reason why, just a test of my technical skills. Again, the inverted heatsink is just a challenge and not a major breakthrough, there is no reason to speculate about its existence or speculate about the possibility of its manufacture, it's just my personal project that I started with no motive. Also, I broke a cigarette and used this block of aluminum to inhale the tobacco I exhaled into my system to check for leaks. The smoke had to travel through my system and through any leaks or cracks, which luckily I didn't have. Thank you for taking the time to read this.