it doesnt make sense to me but is there any way/ reason being in the crib could cause worse gas? my boys are 3 1/2 months..last time we did the crib transition they had horrible gas so we went back to rnps and switched formula. well we tried again and it goes fine until sometime after midnight the gas pains start!  this time it seems to be only one of the twins. it isn't nearly as bad if he's in the rnp.  just a coincidence?  the mattress is slightly elevated..till they roll sideways 
Re: is there any way...?
my son seemed worse when he was only a few months. He is almost 7 months now so it seems better. but i had to put him on the AR Formula and put elevation blocks under the crib legs for a good 2-3 months.