That’s very comprehensive Simon and I’m sure helpful to all. My ‘done up nice and tight’ was not using a torque wrench but, like you, done by ‘feel’ as I’m always cautious with aluminium and rivnuts not to over stress. I regularly check fixings like this anyway so I’m content with how it’s all been installed. Having driven the car for a couple of two hour sessions on Sunday (great Open day at PGM by the way) it was clear my co pilot did need to have the seat slightly closer and if I’m honest it would have been slightly more comfortable for me too towards the end (slightly overstretched arms and leg syndrome). So, I ordered the TR1 adjustable runners and have just spent a good two hours trying to get the right fitting of the drivers seat. Unfortunately the TR1 uses the same unhelpful approach of a bolt through the floor from above which means lots of cursing when you can’t quite reach underneath and above at the same time (exhaust not helping) and the runners don’t quite align with the holes in the floor (again) and not wanting to over enlarge anything. A second pair of hands made it quicker and less painful. Anyway, it’s in and it’s much better! I can confirm that on an SV car the handle on the adjuster does not foul the cross member in front of the seat PROVIDED you don’t have the seat all the way forward ( lowered floors). It’s also a higher quality runner than the standard item. I have been dealing with Nationwide as supplier of the seats and fittings and they have been superb. Efficient, friendly and very professional, so thanks to them for a prompt service (24hrs turnaround).