Can't take router apart
I have got a very nice, used router for 1/2" router bits. It doesn't have a manufacturer name on it but my guess is that it's a Hitachi, it looks a lot like the M12. Unfortunately the switch is broken, so I have to take it apart to repair it. I took away the base part and then the four screws on the bottom, I can't find any other screws to undo. I suspected that I would be able to pull the blue plastic part away from the lower metal part but I simply can't get it loose. It's driving me nuts, I have spent so much time pulling in the d... thing. I attach photos. Any advice?
Regards from Sweden