As they are black and white, I couldn't see easily, which side of the handle the washers should go (inside or outside) on looking closer, the bolt fits in the square hole on the inside of the handle, so the washer goes on the outside, with the folding handle release lever.Also wasn't sure, how much to tighten the release lever. If you tighten them up too much the levers will not release and allow the handle to fold. (This is not explained in the instructions).I had to back them off a turn to get this to work properly.Assembling the grass box and handle was quite easy, you just have to make sure all the sides are clipped in properly.There is a plastic tongue shaped part, that fits on the base of the grassbox. That caused a little confusion, as we weren't sure which of the openings on the base it should clip into (This again wasn't clearly explained in the manual)It turns out you have to push it down a little farther than you think until it locks into place.(I have added some pictures showing this part in place.Fitting the grass box make sure you lift the flap up high enough, before slotting the grass box in from slightly above.

Gc pro box review