Colin,

I'm using the YS super Mount, the vibration on the airframe is really low compared to the 170 with no CDI, and I'm getting 137mAh per flights as I mentioned, actually it's about 10mAh more or less depending on the wind but the average is 137mAh.
If you can use two batteries I recommend you to do it, just the peace of mind worth it, and you will be able to get those 5 flights, really, if I do it you can too.

Regards