I got to say now I really love the Cromwell, 2 shots, 2 tigers down, in less than 20 second, did it several times. My Cromwell one shot some KTs as well, they may lost half bar(some 3%~4%) of health while crossing fence or whatsoever, one shot on the top blew them up.....Now I almost refuse to get into firefly/TD when I play allied.
I'm rather busy at the moment, hopefully these videos would be released in 1 or 2 months.