I have just bought a second hand tinny i.e. 2013 Clark Pursuit tiller steer with 2013 Mercury 30 two stroke. It has thwart seats to which the previous owner had attached bucket seats. He did this by bolting steel powder coated swivel bases directly to the thwart seats. The issues that I have with this are that the swivels are powder coated steel and that the thwart material is too this structurally to have the bases attached directly. I would like to know what other member have done to attach bucket seats. to their thwart seats. Thanks in advance, Winston.