hi ziv,

they are currently attached to the rail with a very strong double tape that i use on real aircraft ,cause is not ready for flight yet i cannot say for sure that is a good idea,tomorrow i will make an effort to copy a system that i saw in a model show f16 where you make 2 L shape "teeth" on the side of the missile and 2 slots on the rail and these 2 teeth are slotted inside in the direction that the wind will be pushing them against the slots so as to not drop or move.....may be not so clear but when i finish it i will post some pictures
to see...

regards NICOS