I am currently SMC Housebound. I got there by being 100% PTSD plus 60% CFS. Now, here is my question, lets say I am diagnosed with another group of disabilities that stack up to another 60%, should I file for, for lack of a better designation, "SMC-S2"? I have seen reference to the SMC-R being awarded more than once, or SMC-R2, so my question would be can all SMC letters be awarded more than once? Thanks in advance! EDIT: or would I simply go up to the next higher letter, perhaps L