Hi when I first got my 355 it would hunt for revs, sometimes up to 2000 -2500 and sometimes down to 800 where it would sound awful, the cars happy at around 1250 Before I bought the car it had recently had a new aftermarket throttle position sensor so I swapped it with “used” genuine one and the problem was resolved, fast forward a year and 5000 miles the problem is back. So I’m assuming the used sensor I installed has gone faulty again. I can get a new genuine sensor for around £220 from superformance, or new aftermarket ones are around £25 on eBay, now has anybody else had issues with aftermarket throttle sensors? im wondering if I just had a “bad” sensor ( do they need calibrating??) and that a £25 would usually be fine, or do I cough up and pay the Ferrari tax.