And, since he had already shown proficiency in normal and x-wind landings and go-arounds, Billy had (more than) fulfilled the requirements for receiving a tailwheel endorsement.  

 Billy recently earned his private pilot certificate and is only a few days away from his instrument check ride, but still, in parallel with all that, he decided to sharpen his piloting skills with a tailwheel endorsement. Nothing sharpens your skills like flying a tailwheel airplane without flaps. 

Next step will be spin training and commercial maneuvers.

Congratulations,

Jorgen Valkaer, CFI, CFII, MEI