I’m not even interested anymore but for posterity, here is my modular arithmetic of the keywords SANBORN and SCHEIDT into K4 of Kryptos once it has been split into two 7×7 grids.


I did addition and subtraction because we have no way of knowing which is necessary for decryption.

p.s.  Don’t you have a hard time caring about a big blob of calculations like this?  I can’t be the only one…