The Chipper SS is a new design based on James Wiebe's earlier UltraCub and ProCub ultralights, adapted to mirror the appearance and construction techniques of the Experimental Amateur-Built Chipper. Your kit is almost certainly one of the original thirty or so E/A-B Chippers that were sold before the company had a fire at their factory in June 2019 and ceased operations.

The good news is that Mr. Wiebe has resumed support for the design and is working on resuming production of the E/A-B and the new ultralight. There's an email address and phone number on their website, here.

Steel yourself for some frustration. A colleague who's building a Chipper (also a second-hand kit) says that the builder guidance is somewhat lacking.