[ninerguru]

I voted serious as I have rebuilt 5 911 air cooled engines (3 mine, 2 for friends) and done 4 trans (1 mine, 3 for friends) in my garage without a lift... Have done suspension (including torsion bar indexing), brake upgrades and rebuilds and rewired my 74 track car. But recently had the pros do my GT3's RMS. I will be upgrading the GT3's suspension this winter, pretty much a bolt off, bolt on...

I think by far, the hardest thing I've encountered, is the timing of the cams on an aircooled engine. It is critical to get it spot on, but the cams have a tendency to walk as you tighten up the nut. If you ever done it, you know what I mean...