Tuxduino,
you are correct... I must have removed it when I was trying to get within the character limit of the post... my actual library code does include this...
/*
// Left motor pin config
int speedL = 3;
int brkL = 9;
int dirL = 12;
// Right motor pin config
int speedR = 11;
int brkR = 8;
int dirR = 13;
*/
Regarding the non-aborting... you are right, I hadn't considered that!
I knew that this would be an iterative development process, I'm just working out what the next iteration needs to be !
Thanks guys...