I was having similar issues. Problem progressed to the bike shutting down when I turned it on. Just heard back from the shop that the battery discharge port was burned out, needs replacing. I am looking for more info to avoid that in the future

I have the same questions as the others - it's a direct fit for sure? Seems made for a different frame size. Also, I know the factory rack comes with a lead for moving the brake light, were you able to move and mount yours to the rear of the rack?
Update: I also got this rack, got better quality fasteners for it and have it mounted. I didn't need an extender for the brake light cable, which was nice. The huge Iberra panniers are perfect for touring, which is what I want to use it for.

"Changed the tires to the mongoose 20x4 tires for the Oregon soft sand.  Ya may not really be mongoose but I  really like the tires for the first few rides." 

I just ordered a Radmini 4, will need to change the stock 20x3 tires for something with better snow grip for riding this winter in MN. Can you let me know where you got the Mongoose tires? Did you have to swap the tubes as well? I'm guessing it'll need that. The Rad bike store is out of the Kenda rubber which would fit for sure.
Update: ordered a couple of CST Big Fat Tires for the winter. Looks like they'll do the trick. CST Big Boats will be best for summer I figure.

Thanks
Brian