I am tying down to size 26 for a trip to the San Juan River (New Mexico) where small flies are a must. If I feel I need smaller (down to 32), I buy them at one of the fly shops along the river. I use hooded magnifiers similar to this one http://www.amazon.com/hobbytoolsuppl...67221241&sr=8-1 although mine does not have the loupe or the lights. I think I bought it at Sears about 30 years ago. Really handy for close work like fly tying or rod building.
After you tie these midges for awhile, it is hard to go back to tying normal flies, like 14 and larger! It is fun to tie these little ones but production goes out the window. You must have lots of patience so hang in there and good luck!
Forgot to add that midge jaws are a must.