If it is a fansub and it falls within our Listing Policy then we would list it. Not sure what is meant by "external subs" since that seems to imply they just release a (timed) script and a raw, if so then we would not list it.
Daitran 3 Ep 1-5, Fang of the Sun Dougram 1-18, Panzer World Galient Ep 1, and Cyclone Bryger Ep 1. I'm not affiliated with either group, but I very randomly just now discovered these and would think exposure here to the mech folk would do them solid. Thanks!