can someone explain what record and play is for some DCC trains? how does it work and does Bachmann have this feature?

where can one go to find a chart or guide that will show the benefits of CV settings? For example what is the best starting voltage? whet is the best top voltage. I would like to experiment with different settings but i am afraid i will screw up the DCC board.

I am getting ready to purchase two GP-40 DCC engines. Should I invest in flywheel or does it make any difference? ( also should i order with sound chip or install on my own later)?

A friend gave me his DCC decoder from his Bachmann GP 30 and I want to install it into my Backmann GP 30. All i need is a wiring diagram. Does anyone know where I can get a schematic ? 

Does Bachmann offer a Program Track booster?  If not can someone recommend one?

ok all of you seasoned train people out there. Please explain to me how to understand CV values. ( for example CV8 =8)  that is like saying the Molecular structure of a split atom is to the power of 10... SOOOooo Confused. I have a MRC advanced controller and have been told that I can do great things with it. Maybe I need to fine someone in my area to show this simple guy how to figure this out.

If I add sound to my G30 (ho scale). Do I add the new board along with the other board or does the new sound board replace the other board? 

I am a little new to the DCC world and wonder if someone can tell me why my train speeds up when going down hill? I have tried to set the CV code but then the train will lurch going down hill. I have a 2% slope and have been pulling 5 coal cars.  Does anyone have any thoughts?

Does Bachmann offer a DCC with sound HO Steam engine? I am not seeing any on the web site.

I am sure this question has been ask in the past. The couplers on my 3 engines and higher that the couplers on my other rolling stock. How do I get them to line up?

I purchased a Bachmann GP-35 from a friens that said it was new. It was still in the box and looked new. After I progrram on the program track and place the engine on the mail track i get a message on my cab that syas "saved data". Is their a way to do a factory reset on the engine or should i just buy a new DCC decoder?
By the way I very much apreachiate all the help from the experianced Train entheusiest here on the Bachmann site.

I have just bought a Bachmann G30 diesel. (HO scale) I programed it just as I have my other engines but this new (unused) engine seems to be very sluggish. It starts off very slowly ( sits and hums) then after a few seconds will get up to speed. When it climbs my ramp on my layout (2%) it struggles to get up the incline. My other engines will go up the incline with no issues. My question is, Did I set up the engine incorrectly? Or is there an issue with the Engine?

I am new to the DCC world and have just purchased a Bachmann GP Union Pacific 743 60713 that came DCC equipped. I am wondering if I can change out the DCC chip and add one that has sound?