. 453 rim hole tubeless tire valve (auto parts store) PVC cement 1/8" steel rod 24" long 2-liter soda bottle 6’ of 1/2" Schedule 40 PVC pipe (all the following parts are Schedule 40 PVC) 1 1/4" x 1/2" Bushing 1 1/4" Coupling 1 1/4" x 1" Bushing 2 1/2" elbows 4 1/2" caps 3 1/2" t’s
This lip must be at least a 1/4" below the top of the bushing.
Start with a 3/32" bit to start the holes, then a 5/32" drill bit to cut them to size. Use your rod to poke through the holes and get out any hanging bits.
The 1-1/4" bushing end should point to the larger end of the pipe.
Elbow joint Smaller bushing PVC coupling Launch pad bushing 1/2 PVC pipe.