Since you won't be casting long distances with this outfit(if you're planning to cast, and handle, 80 or 90 feet of 2wt line on a 6'6" rod, you can pretty much start your own religion), you have a couple of options for reducing line coiling that don't involve large arbor reels: Cut a DT2 line in half(saving the other half), put a loop on the back end, and put it on a small, light reel like a Hardy Flyweight, CFO I or II(old II), or one of the newer little reels, or cut 20 or 30 feet off the running line of a WF2 and do the same thing. Either option would allow you to put a lot of backing on your little bitty reel, making the effective arbor much bigger. Backing is much cheaper and lighter than large arbors(Waterworks P-1 excepted).