I am not one of those that will just nod in agreement when I don't have a clue what you are talking about so this may come across as a stupid question.
![n~](https://stunthanger.com/smf/Smileys/classic/nut.gif)
So much of what we measure is at mean chord. For whatever reason I have always balanced my planes at that point. Seems silly since balancing them at the fuselage is just as easy. Maybe it is so that I can get a quick visual on where my wheels are relative to the balanced point. So, when we just say 2 1/2" behind the LE, where on the LE is that? Centerline, fuselage joint, mean chord? I know, it is on the plans but the only plans I use are ones I drew up and "That looks about right" is not a standard linear measurement.
![Layingdown LL~](https://stunthanger.com/smf/Smileys/classic/side_laugh.gif)
I just make sure the CG is behind the wheel, tape one of those little line bubbles to the nose and hang it till I get a slight down bubble then go out and fly a couple of 15 seconds flights. To me on a first flight it is only important that the leadouts be behind the CG, the wheels in front and that there are the same number of takeoffs and landings. I find bench trimming for balance to be a waste of time. Getting the right tip weight, CG and leadout position are best done at the field.
OK, this is the point where you call me an idiot ....
![n1 n1](https://stunthanger.com/smf/Smileys/classic/nono.gif)
Ken