Hi guys my arrow 500 was equipped with rigid tapping i have'nt used the machine for a while and went to do some drilling and tapping and an alarm saying no rigid tapping avail must purchase from machine builder when i try and do so now had no probs for 2 years with this. Does anyone no the parremeter or how to put this back in as it does not appear to be in purchased options and come to think about it i can not remember seeing it there.cheers and thanks in advance.