Dear Saab community, I am playing with the idea of my 93-I convertible, 151 kW, year 05/2000, 99,000 km, to miss an additional boost by using Hirsch Step1. I would like to combine this with a trip to Switzerland and have it installed on site in St. Gallen. My questions to you would be: 1. Is the power increase from 151 kW to step1 even noticeable or worth it? 2. Who has experiences with late tuners (km=99,000) 3. How does the TÜV registration work? e Certificate and everything is zero problemo? 4. What does this registration cost? 5. Will the insurance premiums increase? Thanks in advance and greetings from Wiesbaden! Marc