Actually, the burn times aren't bad at all. i had to cheat to get it back in orbit around kerbin. (i was looking at the wrong notes concerning the delta v). it worked exceptionally well. i am considering adding another docking port to the back to attach a booster module for larger transfers. this may be off topic, but if i post a picture of the delivery platform and provide a .craft file, could someone help me optimize it? sorry if this is the wrong place for that, like i said, i'm new.