Does anyone know if there is a way to program a Hobbywing Xerun XR8 SCT speed controller for reverse? The manual only mentions a Wifi module or program box. I am going to be disappointed if I have to spend more money to go in reverse. My Castle systems on the truggys uses the laptop.

You'll need the program card. (cheapest option) Maybe someone you know may borrow you one or set it up for you. Find them used on here reasonable. ($20 or so)
Here you go...brand new for $20.

END OF 12TH SCALE SEASON BLOWOUT - TEKIN, SPEEDMERCHANT & HOBBY

You can program it the good ol' manual way. Via the Power and Set switch.

See manual for how to and options:

http://www.hobbywing.com/products/en...RunXR8Plus.pdf

This is how I programmed my Xerun SCT Pro (older version) before I figured out why my Wifi Express wasn't connecting lol.