Wheel alignment 1993 100 2.8

[Treurnich, Leon]

Hi

Can anyone tell me what the Castor angle should be on the 100? 

My car has vague steering, floats a bit at speed with a cross wind, and after going round a corner it doesn't pull straight very strongly (you have to
help it the last few degrees). 
According to internet sources these symptoms are perfect for a diagnoses of "incorrect caster angle - not positive enough"

I took it to a wheel alignment place who found that nothing is wrong with the wheel alignment. The castor angles were 2.2 and 2.8 deg.

The AA test found nothing wrong with the steering mechanism or suspension, and the guy actually suggested that the castor may be out.

The tyres are fairly new Firestone Firehawks.

Any ideas?

PS. I know the steering's vague because I tested other similar cars that where much more precise


Regards
Leon