I've just installed a set of Gemballa one way-adjustable (bump/rebound) coilovers suspension, which are basically H&R units with H&R springs. I was told by the local porsche specialist (the only one in my area) that no alignment is required for lowering the car by 30mm. This makes me worried because I would like to have it aligned properly and preferably corner balanced. Since the mechanic is not interested in doing the job, I have to take the car to do alignment elsewhere.

Would any professional alignment specialist with the right equipment know how to align a p-car? The problem with these specialist in my area is that they have no experience with p-cars (mine will probably be the first p-car they will lay their hands on) as they are mostly involved with WRX, EVOs, Skylines, Merc, BMWs. They have a "HUNTER" machine. If they do not have the correct parameters to aligh the p-cars, can I use those in this forum-are they sufficient or further parameters are required?

Additionally, can someone explain how to properly measure the ride height so that I can make sure that all four wheels are lowered by 30mm. Then, I can take it to an alignment shop to dial in the GT3 spec. Can someone please verify that this is the GT3 spec:-

Rear Axle:
Camber: -1.50 degrees +/-.10 degrees
Toe: +08' +/- 05' Total Toe +16' +/- 10' axle angle: 0' +/- 10'

Front Axle:
Caster: +8 degrees +/- 3 degrees
Camber: -1 degree +/- .10 degrees
Toe: +03' +/- 03' Total Toe: +05' +/- 05'

I would appreciate your valuable advice on the above. Many thanks.