Two lemons thus far - Streamlight TLR-8A LED Weapon Light and Laser

I've had the original TLR-8 since it became available. Its been fine except for the side switches being tough to reach on a G29. So when this new TLR-8AG became available, I jumped on it and put it on a G19. I liked it so much that two days later I bought another to replace the one on the G29. The second one was a lemon because the laser strobed and the light flickered. Optics planet exchanged it for a new one and the newest (the 3rd TLR-8AG) is a lemon as well. The elevation adjustment doesn't work and will back all the way out of the unit without moving down enough to be on target at 7 yards. The laser unit itself will actually move around with finger nail pressure. I haven't even had a chance to take any of the TLR-8AG's to the range yet, so at this point the first one I got could be problematic as well and I just don't know it yet. I thought this was going to be the best design on the market, but they didn't come to the table in regards to build quality.