Not to beat a dead horse, but I also never use the pads. Also different mics affect what my levels are set at, but I have rarely had any distortion unless I was way over the top hot. The deck can run hot with no audible distortion. Bass is related to the mics, and I have primary mics that I like outdoors (Busmans) and Mics I like indoors or in muddy rooms (Berliners).
I use the recorder to record, and look toward the mics and the room and my placement for sound. The deck is great though, so easy to use. I have never seen a need for the limiter, but the stereo Link is used in conjunction with the limiter. With stereo link it creates a left right stereo limiter and without stereo link, a mono limiter for each channel. If that sounds confusing, it is, and playing with it may make the differences apparent, but I have never seen a need for a limiter unless somone has found a way to drop the deck in their pocket to st3@lth

I really like the flexibility in how you can set the meters. You can set the rate of attack for current meter, peak decay and clip indicator. I like fast indicator, fast clip and slow decay personally to see what is going on when recording.
Lastly with batteries, I know there are schools of thought but I always use a good external battery set on 12 volt, and keep fresh internal alkalines (lithium is fine too). I know a 9 volt setting works too, but every battery problem story I have ever heard with this deck was coincidentally from somone using a 9 volt external battery. 9 volt works, but in my experience the deck really likes 12 volt better.