I have the night vapor and it is a great plane, basically an ember with lights. BLAST to fly It orginally came with a 70 MaH battery. I have been flying it with 150 MaH batteries for months, gives me 25 minute flights, probably would do more. I don't thinlk you'll hurt the motor or ESC by using a 170 MaH battery. I have read that the GWS 4090 (I tihnk that is the size I remember reading) is a great prop for the plane. You can also get what is called a prop saver kit, it screws onto the shaft and allows the prop to be held on by a rubber O-ring. I can't remember but I believe my vapor has a small nut that holds the prop on. I would not glue to the prop on, as it would make it very difficult to remmove if you were ever to break another prop.