CLP200P Carpeted Pro LP Case With Recessed Hardware

Are these stackable when fully loaded? Is it safe to do so?

my LP's are in outer protective sleeves (which go over the jacket) is there room on either side of the lp's when in the case??

Does this hold 45rpms or is designed specifically for LPs?

Hi, as this case does not have wheels, I am looking for something like this but with wheels. Can you recommend where I can get one?