I've just bought a new mesa boogie 400+ bass amp - which is amazing, I've got a 4 u skb rack case which it fits quite snuggly but maybe a bit to snuggly? There's plenty of room at the rear but not much at the sides or on top at the rear, I put it in the case and left it on for few hours and the side furthest away from the fan got a little hot - is that something that'll happen anyway? Any advice much appreciated, cheers!