Odyssey II was my Level 3 Certification project. Built in summer 2017 from a 4″ Madcow Fiberglass Frenzy kit, it featured split fins, a 75mm motor mount, dual deploy, and my first flights with electronics.
There wasn’t anything especially difficult or unique about this build. I’d been building 4″ fiberglass rockets throughout the year with my university team, so this followed suit with extra attention to details like epoxy fin fillets, paint, ease of electronics arming, and minimizing prep in the field.
I now generally fly this just for fun on K motors, as it is still my largest personal rocket.