I tried this IAD JFK commute for a short while back when B6 had 5 a day on the 190s as well as a slew of DL RJs. Lots of guys doing this one! While I was always treated well by the blue crew (thanks again!) I gave up, just too much stress.
It was easier for me to commute transcon to SFO from IAD than to do the 45 minute JFK run. Looks easy, but it's a tough one, good luck!