I just flipped my TH350 crossmember 180*.
IIRC I borrowed a high carbide drill tip to make NEW holes , and later realized I didn't even need them.
I used the Trans Dapt motor mount plates, and my stock cups because the Trans Dapt cups were too small.
I'm sure after 4 years some better options have come out though.
Sandy Hook RIP Little Angels-Charlotte Bacon,Daniel Barden,Olivia Engel, Josephine Gay, Dylan Hockley, Madeleine Hsu,Catherine Hubbard, Chase Kowalski, Jesse Lewis, Ana Marquez-Greene, James Mattioli,Grace McDonnell,Emilie Parker, Jack Pinto, Noah Pozner,Caroline Previdi, Jessica Rekos, Avielle Richman, Benjamin Wheeler,Allison Wyatt.
Also remember the Teachers/Guardians who lost their lives