i guess i will try flying it with the bays open! - - - Updated - - - update: manged to get it into sub-orbit i took pictures at parts i had to leave the hanger bay open the whole way - - - Updated - - - 2nd flight carriering 7 kerbals 100km obit achieved. Left the bay doors open the whole away until all tanks were relesed to be safe - - - Updated - - - 3rd flight completed no explosions with cargo bay closed at start. i have no idea what i did, might have been me taking the parts of and placing them back. maybe the 1.04 went and changed the item that was exploading - - - Updated - - - just went boom on release of main tank..