Sinking dollie wheel

First I want to credit Pete Rawls for this mod. He said it has been posted on the forum, but I have been unable to find it. I think it's worth reposting. I had already replaced the hard plastic wheel with a hard rubber ball bearing wheel from Harbor Freight. After seeing Pete's idea I have added 2 more. Most of the time we like to reposition our trailer after unhooking the TV. This should make this a lot easier under soft conditions. Thanks again to Pete. 
It looks like @MN_Jim was the originator of this concert so thanks to him as well