So couldn't quite find the answer I was looking for, so maybe someone here can give me a better explanation.  Using BFD2 want to record all my drums as mono from the synth.  So I send each channel in BFD out to a mono channel and set all the channels in sonar to mono, but the audio still outputs as stereo, unless I pan all the way to the left, then it sounds like mono, to me that doesn't make sense.  So what am I doing wrong?  or am I supposed to do it that way?  Why do I get a stereo audio image even though I'm telling the channel to act as a mono channel?  Is it that BFD has all stereo samples and so I will have to pan to the left anyway?   Newbie seeking advice, thanks in advance!  

A mono track outputs the same information to both sides of the stereo field. If you want to emphasize it to one side of the audio image over the other, you can pan it left or right. 

A stereo track essentially contains two tracks of information: the left and the right and you can emphasize (balance) one of those tracks over the other by panning it left or right. Essentially all you're doing is making the one side louder than the other, but not moving the left image to the right or vice versa unlike a mono track. Examples of stereo instruments are a guitar with a stereo effects box, a piano mic'ed with 2 mics one on the left and one on the right side of the soundboard, a stereo synthesizer, etc. 

In recording, mono tracks are more flexible. If you're trying to replicate the sound of a band or orchestra on stage, with mono tracks you can place the instruments where they would be on a stage. Most instruments and microphones are mono so its best to record them onto mono tracks so you can place them in the stereo field as they would be if you were recording a band on stage. It also helps to keep the instruments from masking the frequencies of other instruments so you can hear them clearly. You can also use effects like reverb to move the instruments from the front to the back of the stage. There's some good books on this, including The Mixing Engineer's Handbook by Bobby Owsinski. 

Drums - 5-10% L or R
Bass - 5-10% L or R
Lead Vocal 0%
Piano - 30-70% L
Guitar - 30-70% R

This is just one example of how you might setup the image. How you actually do it is up to you. 

The routing in BFD2 can seem a bit convoluted, but you need to spend some time working with the interface & Sonar in order to wrap your head around it

When you first insert BFD, choose "All Mono Outputs"

Then, inside BFD, mute the outputs for Overheads, Room & Amb3. This will just leave the Direct channels feeding into Sonar.

Click on a kit piece (assuming you've loaded a kit) and you'll see in Sonar which channels are receiving the signal. There will normally be 2. From track view, delete one of these so only 1 channel is receiving BFD outputs.

Do this for every kit piece.

Now you can mute the directs and bring in the Overheads - check what channels these are feeding and change the track interleave to Stereo. Do  the same for Room & Amb3

Check the BFD mixer page for any inconsistencies between the kit pieces and Sonar, changing the output channel where necessary.

I would go on to talk about Drum maps, but that might be stage too far at this point.

Once you've got it all configured the way you want, save the whole thing as a project template so you can easily recall it in the future

Thanks guys!

@Bristol, thanks I'll try that setup.  Is there a difference from what you just shared with me and switching the channel interleave button to mono?  As I loaded BFD and told it to open all stereo outputs.....

@Daveny5, thanks, a lot info that I wasn't aware of.

No you can do that just as easily.

In addition to the mono directs outputs, I also have 3 stereo pairs coming out of BFD - Overheads, Room & Amb 3.

to set up a stereo image, just image yourself at a concert and place each instrument where they would be on stage. One exception, the bass should be right up the center.

FYI: The pan knob is only 2 dimensional. you need to create a 3D stereo image and this is done with reverbs, delays and other imaging effects. 

You need to place things in the back left corner and the front left side and the mid center and the mid left side and so on and so on.

Cj