My main goal was finding more options (and if truth be known cheaper options) for the 17″ wheels. No other real goal. I was finding very few OEM size options and those that I did find were more expensive than tires for 19″ wheels (that I bought recently and plan to use anyway). There are lots of options for OEM size tires for 19″ OEM wheels in a wide range of prices and capabilities (but not 17″ ones — which seems strange as I am thinking there are lots of those wheels out there).
I was planning on leaving the 17s in the garage as backup so I might just pass on new tires — the ones mounted are useable (but getting a little old).
My research suggested that an open face helmet was a better choice in a car with working air bags.
UK based commenters indicated that most tracks in the UK demanded a closed face helmet for “open cars”. Whether a Boxster is an “open car” or not wasn’t totally clear. Anyway I went with an open face one (my car is a Boxster and I don’t think I will be in the UK with the helmet and my car).
I did buy my helmet online (and it fit the way I wanted) but I can see where trying on first is a good strategy.
You have to remove the front bolts on the seat rail to fit the bracket underneath (there are plastic covers that need to be removed to get at the bolts – they are replaced after – https://www.youtube.com/watch?v=YmGAspMqBRk should give an idea of how to remove the covers) — once the bracket is fitted the bolts (Torx e12) are put back in through the bracket and the rail and bolted down (36 ft/lbs is the torque requirement if I recall). The seat stays in place during the process.
Yes – the bracket works with manual seats (mine are manual) — the lever to unlock and slide the seat back and forth still works as designed.