I'm planning on building a bike with a Qulbix 76 frame and QS205 motor. I'm currently using a bbs02 on a mountain bike and I'd like to temporarily put it on the 76 frame while I save up for a new motor, battery, and controller, since those things are gonna cost me a couple of paychecks. My bbs02 is sized for 68mm bottom brackets, and the 76 frame comes with a 100mm bottom bracket. How would I go about fitting the motor securely in there? Is there a purpose built adapter I can buy?