Happy Friday!
A few days ago, I posted in the what are you throwing thread that I made a 3d printed fixie with thumb stalls / flips in mind.
Design update: It has spikes now.
The spikes really help to lock in thumb stalls, and aid thumb flips.
I’m calling this one “Swoop”.
Definitely my most unique fixie design yet.
I’ll try to film something soon to show you all what I mean. 
Specs
Diameter: 56mm
Width: 40mm
Weight: ~51mm
Material: PLA
Axle: 1/4" Hickory