Couldn't get Wheel Alignment because of Modifications? Options

[DIONYZUZ]

The modification I have gotten were KYB GR-2 Struts and Tein lowering springs with 225 45 17" wheels. I tried getting a wheel alignment today but the mechanic said my suspension and wheels were "unsafe" on my celica. He went on stating that the wheel alignment machine could not align the wheels because of the lowering which affected the camber and caster. He said it requires a new bolt for the caster , but the caster is so so far off that the replacement wont even help the caster. Then he suggested to go back to OEM suspension and said "I owned a Celica GT before and those suspensions are already a sport suspension." Then he said the tires will rub and thats the main reason why there is a pull on the vehicle's steering which is what I believe is the reason it needed an alignment, but it doesn't even feel like theres rubbing. Should I get the new bolts and try another alignment? From what the mechanic said, it seems like nothing will help the alignment.

[Stambo]

I use our alignment machine at work often, atleast once a week. You won't be able to change the caster on our cars because there is no adjustment to be done for that. I've adjusted toe and camber on lowered cars just fine and made them straight as an arrow going down the road. I assume the guy just doesn't wanna disappoint you in doing an alignment