I have a hobbywing justock in mine. Go for the hobbywing 1s speedo. You'll have to buy a rx pack or booster for the justock for $20-30, add that to the $60 for the justock and its, I believe $30 less than the 1s hobbywing. Wish I would've since I have the crc xti and theres 0 room for anything but the speedo and rx.