Gridfinity Wowstick 1F+ (height can be parameterized!) v1.3mf

This is a remix of https://www.printables.com/model/219844-xiaomi-wowstick-1f-gridfinity-holder/files I didn't like that the demagnetiser was sticking out, so I made a few tweaks to the parameters of the original model and made one fixed height depended on a parameter.