I'm at work at the moment reading this so will do as you mentioned later on today, I brought a dedicated Pentium 4 pc with XP and Mach3 on it at the moment while using a male to male parallel cable from control box to pc motherboard.
I did a video of me testing random setups with the motor tuning but I will redo it again with your settings.
I let you know the outcome later on tonight.
Thanks for your time with this its helped.