Wow those look good!
I try to make sure to get my skirt steaks off the grill at med rare/med.
I've let them go a little too far, too, and when I did, I compensated by cutting the strips into smaller sized chunks so I wasn't trying to bite through the strips.
If I get them off the grill at the right time, they are very flavorful and just a little bit chewy but still plenty tender.
GREAT LOOKING COOK!
Pat