Hi, welcome to KH. Knit 8 rows, that will give you double the ridges and you'll be starting the pattern row on an odd number as in the original pattern which may or may not come in handy later.
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper