Done this today.
Took about 20mins from undoing the first bolt to putting the last one back on.
Basically the hardest part is getting the 2 bolts on the back left in, as the coolant hoses, and throttle body gets in the way.
But other than that, not to hard at all. Turns out mine wasnt leaking, but just 2 of the bolts were VERY loose. Either way, all fixed.
Only other problem i found was i only had 1 cam. lol