If the pump was purchased after May 23rd then with proof of purchase your only cost will be the shipping to our service center. We will then install the upgraded magnet, re-flash your driver and re-send it to you. If the pump is used or purchased before 5/23 then the total cost would be shipping both ways plus the magnet kit which is $9.45. The Gen2 flash upgrade itself is free, you only need to pay shipping.
-Tim