How about when you strap on a cooler and meet some friends and one says" what are those 4 bolts holes for did you forget something?" Naw ... RAD left the drawing board a little early on this one.

I have topeak bag and rack on my pedal bike. I also have pannier bags and a Velcro bag  that will work with the mini. What about when you do not want a bag?  You are stuck with unfinished look. A quick ride on the bike trail leaves a rack with bolt holes in it.
I thought about putting screws in the holes and maybe that is a way to go if I can find something that wouldn't stick up too far and cause wear holes in my bag when I strap it on. Or I guess the choice would be to spend the cash and get the topeak adapter.
I'll play with some ideas. Maybe something like the finished look on the wagon could work.

I just assembled a mini and a mini step through both with rear racks. The too of the rack has four empty bolt holes and looks unfinished. If you don't want to spend over a hundred dollars for a topeak adapter, what can you do here. I see the topeak adapter will fill these holes but what about if you can't or don't want to use a topeak mounting system. That is just way to expensive anyway. rack for 79.99, adapter for 114.00 and a bag roughly 70.00, That adds up for a rear bag.

How about maybe a couple of slim pieces of wood that bolts on there? One on each side about 10-11 inches by 2 inches maybe.
Anyone finished off the rear rack for a mini? It just looks like something is missing...