Step Four

Cutting ABS and PVC/Tuning your tubulum

Cut twelve about 16" segments of 4" dia. PVC pipe (enough so that the ABS pipe can attach in the back and the PVC head can attach in the front; 1 = ABS, 2 = PVC segment, 3 = head).
Cut approximately 6" into one end of your ABS tubing roll (basically cut a large slit perpendicular to the end of the pipe). This is to allow a PVC segment to slip inside as you essentially are widening the diameter of the ABS tubing.
Fit one of your PVC pipe segments inside the cut end of the ABS tubing.
Put at least four rivets around the perimeter entering through the ABS tubing first, and then into the PVC segment (I will have a better picture of this soon)
Then run tape around several times in order to seal the gaps securing air flow throughout your combined tube and pipe.
Attach and duct tape one of your heads onto the opposite end of the PVC pipe segment. I recommend duct taping the head on to allow detachment later for easy transportation

	Refer to my tubulum tube size chart to determine how much to cut off from the ABS tubing roll. As always, better to go long on your cuts than cutting your exact measurement. Leave yourself room to trim. Repeat the above steps for each note on your tubulum.

Congratulations! You've built your very own tubulum! (except that the picture to the right shows mine before I added the bottom support 2 x 4s and wheels)