Hello,
I am comverting a Echo CS-4400 which is a BME 44cc with mag. I ordered the carb adapter from BME and the hub from Pete at Wacker Engines. The correct NGK plug is from Advanced Auto. I had to make a coil mounting bracket, since the coil was mounted on the saw body. The new Echo CS-440 is a different motor. It dosen't look as good.

Regards,Dave