This was a big investment, especially when this is a hobby and not for a living. After using a Porter Cable Orbital for years, it was time for an upgrade. Phil yet fails to disappoint, recommending Rupes has been a great investment. It’s great to handle, lighter, quieter and more importantly, the locking mechanism is fantastic. It’s design is great for position and handling, not to mention the vibration isn’t as harsh, and it’s easy on the wrists. It cut my time by almost half, depending how far you want to go, 12 hours is enough for me.