i have got a definitive way of securing the seats which removes the need to spend hours upon end jumping/bouncing on the seat base to make it clip down.
for this you will need 1 tool, a hacksaw, and this is what you must do:
cut where the orange lines are (first part) on the seat base floor clip, and simply push down on the seat base. one of the legs on the metal clip (the one nearest the front of the car is most desireable) will go into the cut out and lock onto the floor clip. granted it will be harder to frmove the seat base next time, but it is by no means impossible, and probably a lot easier to got off than trying to refit the base. and i garuntee this will work