I get the same measurement when I hold either the trailing edge or the max thickness (the main spar) to the table. When I measure at the last rib (on the main spar) I get 2 3/4". If I measure at the wing tip I get 3 3/8". The plans and the instructions in the kit call for a 3" block under one wing tip while joining the wing halfs.

I love the way the CD flies. If the ARF comes in as light or lighter than the kit you'll be really impressed with the 46FX. I built mine with a OS 46SF, Macs muffler, and single Hitec 425s for ailerons, rudder and elevator. The rudder is a pull-pull. Final weight is 4 lb, 14 oz. Unlimited vertical. Loops would fall off to the side until I balanced the plane laterally. Likes to wag its tail on the downline from a stall turn. Rolls and spins are great. Very hard to make the plane stall. Never encountered a tip stall.

Just one hint - be prepared for major floating on final! Make sure the idle is very low and go long and low when setting up for landing. Even dead stick the bugger will float past you. Not a bad characteristic, but you have to be prepared for it.

You'll like it....Rich