Review on Metabo 619002890 Cordless Rivet Gun by Jonathan Unruh

I've already had two errors. I sent the first one back in exchange and now this one. After about 1000 rivets, it stops grabbing the rivets. I disassembled, cleaned, inspected and reassembled with the same problem. When it works it's great, fast and makes life easier, but the fact that it only lasts a few months isn't good. I have another cheaper cordless rivet gun that has been running for a few years now so what's up? As an aside, this is NOT made in Germany, it clearly states Tiawan, contrary to what the product description says.