Though the modification itself is simple enough to be done in approximately an hour, some pilots/customers prefer our in-house technicians to do the modification. For an additional fee your modification will be professionally installed and completed and shipped back to you. The labor fee for the modification is $99 and we paid for shipping back to you. Your transmitter would have to be mailed to us. Upon purchasing the modification we will inform you immediately by email of the address to send your radio to.