I went to my friends house this weekend and with the small amount of snow we had we threw together a jump and tested out the maiden run of the ski puller. Right in the begining you can hear a loud pop which is the side of the spool snapping off from the pressure of the rope. I picked up a bigger and stronger spool at another friends house which I will cut down to size and use instead. The initial speed of the puller was a little slow with two batteries, but it's most likely because I haven't recharged them yet since I bought them over 2 months ago.