I done mine 4 weeks ago, I feel your pain. wait till you got to lift it back in 
+1 lifting it off your chest and trying to wiggle it in place while shouting at your mate to;
Me - 'F**king hurry up and get them bolts in'
Him - 'Cant your not lifting it high enough'
Me - 'You wanna **** off you **** and get down here and do this'
It a bit of a shouty / sweary 'journey' between friends
