I did something similar in October in which I just picked a wide variety of grains I like and put them together. The beer was called "Monster Mash". It turned out ok and got better with age but was a lesson learned that it is better to tweak only a few specialty grains instead of "reinventing the wheel"
First State Brewers
Proud member of the Shat in my Pants Brew Club
(ok, I made that one up)