Zippi

I am not aware of a wing area calculation which does not include the "fuselage area".
My understanding is that that (fuse area) is included by definition.

Also, wing span is ALWAYS tip to tip ready to fly. Full scale and model.
Fuselage length is from the tip of the spinner to the aft most part of the rudder. It certainly isn't from drive washer to rudder hinge line.
A good example would be the measurements taken on the current 2 meter pattern planes/FAI rules.

BTW the actual difference in weight between a Hitec 5645 and a JR 3421 is 1.07oz. Going from the C/L of the rear servo location to the CG = 36.5". therefore the total calculated 'weight/balance' is 1.07x2 (two servos) = 2.14oz X 36.5" = 78.11ozin.

Using the CG to front of firewall measurement -11.5"- and dividing the total oz.in. difference 78.11 by 11.5 we find that to balance the increase of 2.14 oz. in the tail we will need 6.79 oz. of weight in the nose.
Adding it up we have the difference in servo weight (2.14oz.) plus the nose weight to counteract it (6.79 oz.) which when added together yields a total weight increase of 2.14 + 6.79 = 8.93 ounces.

Therefore you've got a total A/C weight increase of 8.93 ounces due to your rear servo choice alone (also the stand-offs for the servos are unnecessary with 3421's).

That alone is 1/3 of the total "overweight" you've mentioned. [&o]

Now we can do the same thing for your choice of aileron servos times their moment etc. etc. and come up with even more weight.

These calculations are admittedly crude but they do emphasize the point that it isn't "just the weight" it is where the weight is located.

I'll bet all the concern will vanish when you get her trimmed out-----