I agree, it would be better to have everything interfaced in one unit. The JS box interfaces between the module output's and modifies the output signal. I have no doubt on the capabilities of the Proefi, but the software interface needs to done over from a clean slate. I would gladly help you in re-designing the interface if needed. People want things simple easy to read easy to access, easy data logging and overlay of maps. I would base the software on the XFI style interface, with many improvements such as, user adjustable colors, font sizes, customizable gauges for a dash, large icons, short cut keys,etc. The DOS version of FAST was so user friendly it was a pleasure to use, but it lacked many features not found in the newer XFI units. Then the windows version came out and the large icons were gone and tiny submenu's were substituted instead, this made the interface not as friendly as before. The power adder section added more complex features, but the way it operates with sequence's of positive and negative inputs is a nightmare. I might re-load the proefi software again to re-fresh my opinion of it, but i do re-call that it was way to complex for the average user to be comfortable with...If you click my fast improvement list you will see the many features the racers have asked for in the fast system. However, Fast is not doing any changes to the software based on this list, which is kinda of disappointing to me. However feel free to study the list and implement in Pro_EFI where applicable...