CAS Adjustment too far?

[lil corb]

In the situation where my mechanical timing is DEAD on properly (just did timing belt and verified multiple times) and my CAS has been installed with the correct marks together and not 180* reversed and at TDC. What would cause the CAS to have be rotated all the way clockwise and it's still only lines up at the T and not at the 5* btdc mark with a timing gun light(while the timing pin is checked on link) It seems like I need more room for adjustment to get it to the 5 degrees btdc but I physically can't.

I have been trying to figure this out for months now. Could it be a bad CAS? I am also using a Fuidampr crank pulley and I have my idle set at 1000rpm due to FP2 cams.

Should I set my idle at 750 and try to re set ignition timing?

Thanks