Hi all, Question for the group. I have installed the above items in my 51 and uploaded the firmware to 5.4.3. Updates all went in with no problems and all items were found. The thing I have in question is when the AP74 is switch on, all the back lighting comes on and when I turn on the D10A, they all go off. Is this normal? The Value Knob of the AP74 will adjust the barometer. Much to learn on the install yet but want to make sure this is how this part of it is suppose to work. The D10A does not show the AP in the lower left corner as the manual states, so something is not right yet.