Originally Posted by: magicninjaWhereas C to Eflat although enharmonic to D# would be considered a minor 3rd right?

right in the context of building a cmi chord otherwise it would be an interval of a aug2 or an interval of a mi3. It's just theory. To the best of my knowledge Dajango Reinhardt could'nt read a note or verbally discuss music theory, nor did he care.