opiate2093Row number, each row in SA profile has slightly different cap height/slant so they would look off in the middle of the wrong row. Not to confuse with release order number, R2 (this link) R3 (coming up in a few weeks) for this set. Interest check link on Geekhack posted by T0mb3ry here is for R(ound)3 which also lists row layout for the new revision, which is listed there as "Rows: 1-1-2-3-4-3". This means for example top row (esc, F-keys in standard layouts) is same shape as number row and spacebar bottom row is same shape as a,s,d,enter key row in this upcoming run.