Slap your original box back on and remove the top inlet feed, I found that more responsive and it will make a sound when you push the pedal down hard in third - however i do like the gentle rumble sound from the jms box
Dont really wanna be putting the original box back on considering ive just spent roughly 160 quid on the jms set up! That might be what happens in the end but thats 160 down the drain then! There must be some benefit it can offer me - torque and response is what im looking for.