Roll-up cigarette case

Trying to smoke less i set myself a limit of 4 cigarettes per day. That didn't work well since i needed to carry my tobacco and filters with me for rolling 'em up because i couldn't carry pre rolled ones.
So i fumbled around with openscad some more and this is the result. Now i can pre roll some and won't go over my daily limit so easily... The lid is quite hard to get on and even harder to get off but after putting it on and off a number of times it works perfect.
Since i modeled it too sma