12 week old pullet or roo?

[MessyJo]

I got some eggs from an area person for my broody to hatch. She hatched 9 and they're 12 weeks old now. 3 I've already had to get rid of because they were clearly roosters (and one was crowing already) and we can't have roosters. 2 are definitely pullets. There are two beautiful ones who are definitely guys (working on rehoming them now), but there is one that I am just not sure about. S/he is pale gray, has smaller legs than the obvious boys. The feathers are the type of feathers that are kind of frilly. The tail is looking like there are a few longer ones and the combo is small and sometimes pale and sometimes red.

The one in question is the light gray one. The other two are thrown in for fun cause they're pretty, I know they're roos.