I have learned how to accomplish the recalibration on an older (non app) S5 . After placing base on a suspended surface (allowing wheels to not touch ground) , looking on the RS232 steering connector (base) I connected the third female pin of top row (5 pin total) and the second pin from the left bottom row (4 pin total). press the remotes "a" button, pull the wire used to connect those two pins together. the 2 wheels will spin in one direction together, then alternate directions and stop. thats it!