Size of MMM without case?

[mistercrash]

My MMM doesn't over heat, I'm just wondering if it can be run safely without a fan with a better performing heatsink. The one pictured is just something I did for the fun of it, it could probably be a lot smaller. But like it was said, if the stock heatsink is epoxied on the board, it might not be worth the effort, or risk to try and take it off to put a different heatsink.