First off you will need to get arse insurance and then a zoning permit to change your the function of your anus from a sewage pipe to a recreation facility. Obviously you will need to be trained in the use of this machine. Make sure that when you advertise to find someone to do the trainig that the advertisment complies with all local mandates on the race,sex and gender neutrality of applicants. If you are buiding it yourself make a thorough check that you are not an ******* ***** and have all the necessary papers. Also make sure you pay yourself minimum wage for any time spent building it.
You will need:
Something shaped like a cock.
Something to muffle the screams.
Something squishy to sit on.
Somebody to buy your old bicycle.
Some widgets.