I have the combo, works great. You get a whole lot of useful features for not a lot of money. Works amazing, easy to use, small, light, affordable, great customer service, whats not to like! I don't charge at 40 amps, so anything over 10 is a waste for me since i only charge 2s.
One question is where to get replacement double ended banana plugs?
Get a hold of our Customer Service Center and i am sure we can get you a set. (As long as you are in the Continental US.)