I've had lots of problems with Taigen electronics. Not so much with the hardware but with the very small diameter wires that are used. Also, I've found many cold solder joints. My 76 mm Sherman sits idle because I can't find where a purple wire is supposed to go. So I don't have any main gun fire or barrel recoil. Ground is connected so that's not the problem. Also my first gen Panzer IV has stopped working today. Worked great yesterday. As far as general tank construction goes they've been great.