yes, you just buy the units online through our store and we will add that to the orders list and provide updates when shipped.
The physical dimensions are exactly the same.
Would like to clear some doubts and humble request that just because we have released a new version, we don't want people to think that we won't support the older versions. Please note that all the changes such as color-coded connectors, 4 USB ports, power terminals and other things came from user feedback, we are just trying to make the units better. As per our commitment, we will be doing software updates for both models together and adding features. We are doing one software release v3.42 today with Probing and new backlash comp logic, this code was not able to fit in the controller memory earlier but we re-wrote a lot of logic to make room so that we can add as many features as we can but there are always limitations with every product and over time things do reach their limit.
Releasing the G3 series of controllers was a huge task for us also but we are trying to add both hardware and software features to make things better with time, your feedback and ideas are what makes MASSO different and this is how we would like to keep it for all our designs.