I pulled down the PDF file for the Baby Ringmaster and noticed it had upper and lower spars, unlike the original Ringmaster that had a spar that ran through the ribs. I went out to the garage and pulled out my original Sterling Baby Ringmaster kit and it has a single spar that runs through the ribs just like the full size Ringmaster. The only reason I bring this up is does this change make the Baby Ringmaster in the PDF file not eligible for classic stunt contest. I have been to contests where lesser changes brought out the design correctness police.