In researching a possible purchase of a G1 Blaster, I'm finding that many sellers claim that cassette door commonly breaks (aka the Eject button doesn't work), and many are being sold in such a state. Is Blaster easy to break in such a fashion? Can you disassemble the toy and fix it? (More directly, could I buy one with a "broken" door/button and fix it myself?) Obviously I've never handled a Blaster toy, so I hope someone here can give me a little insight on the door/button mechanism.