porkie ALL of the rear boxes leak mate even the ski box you are refering too, when i first worked at ford my manager had one as a company car ( 5 quid a week commercial tax thing) and his laptop was ruined due to some knob putting it to one side in the back so it would be safe,,,,, and it was where the leak was pmsl,,,,, i was not very popular with him for that

oh they are fucking strong though as i wrote off a scorpio in one and i hardly felt it contact, dented the bumper on the thunder,,,,, took one 2 doors, rear quarter and ripped the rear bumper off the scorpio and all i felt was the truck wobble for a second

the one your looking at also has angle sensors for when your off road...... or " im parked on a curb again" sensors is what i used em for pmsl

ps: clutches are not cheap. box weighs more than benni and beefyand there 2 fatter cousins and overall they are just mazda's