Hi Dave. The driver tests fine. After reading abut these, you'll notice the HGS series having alot of problems with the accellerometerr. When it fails, it cannot limit the distance of travel forward or back causing it to stutter.A fluttering sound likely means the driver is blown. You will need to contact Velodyne to see if they will sell you a new driver assembly. It should be fairly easy to replace, you just remove screws to pull out the old one.
Already pulled. Nothing but epoxy or some extremely hard resin. No identification. There's a guy in jersey that bypasses that but I'm looking at around $300.The only suggestion I can offer in that case is to pull out the accelerometer and try to see who the OEM is. They might be able to get a similar device for you. Beyond that, you might be stuck.