Yeah, I have a 3D print file for a muffler for the power supply, lol. It came with the muffler files for a Bitmain L3 or S9 style miner, lol.
Not too sure about the ratio. My pool pays out in DOGE and LTC, but mines all the available scrypt coins and auto converts to the top 2. I just got it turned on, so I'll know in the the next 24 hours.
I am already looking at a second miner...
its just so fun, even if technically its better to just buy and hold the coins. Sometimes putting all the pieces together, booting it up, seeing it all work and coins starting to come in, the satisfaction that comes from it all is priceless :)
Well, I am actually contributing to the network which gives it all meaning.