There is more(not sure how to load a vid from iphone to make much easier than describing)
New tank old cap felt sloppy. Ring up, order new cap £13, pick up day after.
Try on new exp bottle, sloppy! By that, once tightened up and you get that satisfying lock/click, you can move the cap easily side to side. Very poor imho and not impressed. It holds pressure as thats the centre, threads dont come into contact with coolant(if they did you are overheating). So centre still seals, no loss of coolant, no pressure lost(until undone 1.5 ish turns)
Not sure if will work but demonstrates issue
Thats 2 attempts to show video, apologies if not worked
So long call later, today i nipped TPS again! Tried a new ordered bottle and its a tad better, like a little bit. Not worth bothering with, also said warranty would be difficult simply down to it still being functional(which i get). But for a genuine part, its pi55 poor . So if any b6/7 ends up with a new bottle, check before fitting(ideally at the desk) if order genuine over counter.
Too add yes proved exp bottle is poor spec, tried new and old caps on old bottle and both have no slop when tight. Both new / old caps have slop on new bottle.