Change Cadet chevrons to sleve patches?

[HGjunkie]

Then there's the cadets who can't afford a tailor and cant sew either... i've seen some jacked-up hot glue jobs.

[Al Sayre]

As a former cadet in the 70's I can tell you that the pin on rank was a godsend.  I remember sewing and resewing my rank for encampment only to have some C/2d Lt with a ruler tell me how much I resembled a soup sandwich.  I would recommend doing away with grade for Cadets below C/2d Lt before I recommended sew on rank for them, it actually made some people avoid promotion just so they wouldn't have to re-sew all of their uniforms (most cadets in my squadrons had at least 2 sets of fatigues and many had 4, 2 short sleeve and 2 long sleeve, plus a short sleeve and long sleeve blue shirt).