The sides (part # 4's) that you have to screw to the seats on the lower sides, leave about a 1 inch to 1 1/2 inch gap.  We are disabled and need sturdy seating to transfer to and from.  I'm worried about the gaps.  The corner piece on one side doesn't even have the seat connected to the back of the seat.  Another 1 1/2 gap that will allow instability.

The pieces do not connect to one another either, which could also be dangerous.

Photos to follow.

D. and P. Brown