First things first, the drawings and designs for the plywood-and-2x4 field are really good this year, and kudos to whoever modified the competition designs. The pieces went together very well.
We did find a mistake on the hole spacing for the ramps in the End Cone Ramp and the Middle Cone Ramp (Parts TE-23014 and TE-23015) The spacing for the large holes should be 8 1/4 and 29 inches from the end of the ramp, not 8 and 28 3/4. The modified spacing results in the pipes being vertical with no trouble.
We also modified the order of assembly. On the 2/9 and 2/10 pages, we only installed one of each set of crosspieces. Later, on page 7/9 and 7/10, we inserted the 1/4-20 bolts through the crosspiece, then through the pipe - only then did we attach the second crossbeam, feeding it onto the extended bolts. (we were worried that the holes in the crossbeams and the holes in the pipes would not all line up otherwise.) Worked well.