I am trying to install the rear spar plates in order to bolt the rear spar to the landing gear frame. The wings are on. The manual calls for placing a flox build up between the rear spar and the plates in order to make them parallel to the landing gear frame. . It seems to be almost impossible to do this successfully given the confined space. How do I get it all aligned and the bolt holes drilled precisely? I would be grateful if some body who has done this successfully would provide some guidance as to how to go about this. Thanks.