Yeah, if that servo isn't sitting in the pockect, it's causing the upper and lower chassis not to be fully seated together. That is causing end play in your bellcranks, and causing them to deform their locating bores.
Either get a different servo, or make clearance in the chassis for the servo...
Looks to me like the upper and lower chassis were not fully seated together. I noticed this when I wad assembling our drag Slash. Are the screw holes stripped out where the upper and lower bolt together?