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Yes, if you can change SA96 back before a tool change it should be OK

I had a look in the manual, I can't see a system variable listed for SA96

SA96 will change the spindle orient position for tool changing which will not be good

Can you set your broaching tool so it is in the correct position when M19 is commanded ?

Try putting the T1 and M06 on separate lines

I have run in to this problem before unfortunately there is no easy solution
The steady rest runs on the same rails as the tailstock, if you have the soft limit alarm the tailstock base is close to...

As said before check tailstock is retracted
Check tool eye is home,
Chuck must be clamped, you may need to adjust proximity sensors on chuck cylinder