Haahaahaa I was going down the same road Jimbo but i was thinking sanity instead of satiny, but I then saw OAAAHI and thought hmmmm, no I am not thinking its a word lol.
But sanity is what Im gunna lose if somebody doesnt solve this one soon
I have turned it upside down and inside out, numerically and mathematically, and Im stumped
Think I might just go headbang a wall for a little while, it could help the thought process haahaa
I think the answer is R
Will be back shortly to tell you why
Ok Im not so sure now, just the word straight jumped out at me, but I cant see how it fits in with the other letters so back to the drawing board I guess lol.
Gee! Thanks for the help there Tomk!
I noticed the only vowel missing is E, and as far as I know, thats the most commonly used letter of the alphabet so that would be my next uneducated guess lol. As to why, I have absolutely no logical explanation or reasoning heehee.
I guess that would either be right, or 1 step closer to an answer with 23 letters remaining