The reason why the Surf Adapter is so special is because it enhances everything that made you love your skateboard in the first place. The skateboard deck, trucks, and wheels that you picked out will still feel familiar with the Surf Adapter, and you will still recognize the characteristics that make your skateboard unique.
The Rail Adapter is a really innovative product. It loosens up the back trucks but more smoothly than just loosening the kingpin.
I know you already love your skateboard. You will love it more after you install this adaptor. Major upgrade.
I purchased the front adaptor a few month back, but just got the tail adaptor now. Whole new level of turn-on-a-dime curving. It lets the board tilt in a way that maintain grip even when your center of gravity is not above the board. A very unique feel. If you are wondering whether to get the front only or front + tail, def get both front and tail.