Just fitted the cheapo Olympia set 40-100. They seem quite high tension
shocked at how the acoustic sound of the bass has changed. Not amplified it yet
Not sure if such a clause would stand up in real world courts against accepted precedents like fisher v bell and boots v royal pharmaceutical
id argue relative balance of power of the parties against it
You open a case for breach of contract at the local Court. You’ve paid, a contract is made. If they’d just promised, or if you hadn’t yet paid it would be different
Take a look at this from same seller
https://www.ebay.co.uk/itm/Steel-Pickup-Cover-Protector-for-Jazz-Bass-Electric-Bass-Guitar-Replacement-V9F2-/133978486786?mkcid=16&mkevt=1&_trksid=p2349624.m2548.l6249&mkrid=710-127635-2958-0