Well I put on a D606 on the front of my bike today using the Ziptie method. I thought everything went great until I started on the rear (the front is back on the bike) and I notice that the tube stem has a beveled washer and nut on the inside of the rim and a nut on the outside. The new tubes I put in only came with one nut and the beveled washer, so I used the beveled washer on the inside of the rim and the nut on the outside. No nut on the inside. Is this a problem or should I just wait until I wear out the front to install a nut on the inside of the rim? Or should I go ahead and pull the front and make it right?