A few people have been scammed on the site, Only use paypal to pay for items for sale by other members. If they will not use paypal, its likely a scam NEVER SEND E-TRANSFERS OF ANY KIND.
I designed a tapered insert and matching cap for easy fuel fill ups.
Like many of you, I regularly use the passenger seat and also have no patience to unpack my stuff on trips and fiddle with the unlock mechanism.
I used a 79mm (3 1/8in) hole saw through the bottom, cut/folded the seat material...