Wtf? How to open a Hacker motor?

Right now I'm having a C50 Maxx 14.4V Hacker motor in my hands, but it feels like it is glued together First I took out the 5 screws on the front of the motor, but the front didn't want to go off. So I tried the back 5 screws, and also the back doesn't want to come of Any suggestions how to do this? (I don't want to ruin the beautifull purple can, it's like new )



And another question about this motor; is it normal that it turns VERY easy?