I noticed that it's impossible to deploy a Kanko (B) tactical bomber in the first scenario of Rising Sun if you use a unit from imported core from Morning sun. You can switch between tordpedo and bombs in the "force" tab, but once it's deployed it will be always switched to torpedos. Quite annoying
Additionally, there is no option to discard the default core units. For example in Panzerkrieg there was an option to either use imported core, default core or create new core from RPs. No such option is presented in the Rising sun. Also, I noticed that imported core units do not have experience penalty which is probably a mistake.
Author and maintainer of Unit Navigator Tool for Order Of Battle (http://mfendek.byethost16.com/)