wow... first off, thank you! it was really unexpected to see this thread again. i'm probably still going to use the larger version of the BCV as a heavy carrier, as it just kinda fits that class, size wise. i just figured, personally, that if they took a base heavy cruiser hull, removed the heavy duty exploration equipment vessels like the enterprise carries, and elongated the secondary hull like on your bch, that they'd get all the extra combat efficiency they could want. like the SFB BCH. with the size you gave it, i didn't feel right using it as anything but a full out BB, stats and all. but i still had to use it somehow, because it's a beauty.
as far as Milkshape goes, i'm not really sure what made it crash. everytime i selected the proper .mod file to import, Milkshape froze up for me. had to ctrl-alt-delete it everytime. don't know if that helps any.