V 4.2 and the box will........

Well, I just opened the old H1 TIU that I sent to MTH. $61 including shipping etc. They put in a diode and IC chip....and upgraded it to 4.0.

So, just so I know, and may others who have not been reading know:

1) When I unplug the 3.1 Ver TIU and remote I have on the board now and plug in the channels on this, someone chime in and tell me (us) what goodies I will see that are different from the 3.1 I assume there are many.

2) Will the goodies depend up what engines I am running and what factory features they came with? (I am running about 6 PS2 that are all over 4 years old.)

3) Anything I need to know/watch out for?

Thanks for any and all feedback.

Greg