My first suggestion would be to just send it back under warranty, if you get another one then it might not have the same issues and it'll save you having to do anything yourself, so you might as well try that if it's open to you. As for sorting the issues out yourself, if you mean those spring loaded brass nubs that connect the circuit across the upper and lower receiver, just bend them. If they don't line up with their contacts right then no amount of taking them to bits and lubing them is going to change anything. Just get some pliers and flex them up a bit so that they meet when the gun's together. Their only purpose is to complete the circuit, and they're just bits of metal, so it's not like bending them is going to have any negative effects. As for the hop sending everything high, I had the same problem with mine when I first got it. Even with hop off it would still send everything skyward ridiculously. I fixed mine by taking the stock nub out, because it's massive, and making a smaller one using a biro ink tube - take a biro/ball point pen to bits and just fashion a new nub out of the ink tube, make sure you cut it to the right length because you want it to fit the nub space properly otherwise you'll get a lot of left/right deviation. Alternately you can just buy a new nub, I ended up using a Systema rubber and a Big Out H Nub in the end, the Nubs are moronically expensive for what they are, but I had good results from it. I also eventually got a metal hop arm, someone listed one for sale on the forums. I don't know where he got it from, it might've been custom made, but that eliminates the flexing issue caused by the wheel only acting on one side of the hop arm.