Oh yeah keep a range! If you try to stay at the EXACT same weight then you will go insane!
I was trying to get up to 120, but I'm pretty comfortable in my little range of 113-117, so I'm sticking here for a while. Just make sure to have a redline weight above and below your weight range so you know you either need to cut back or eat more.
And you're right about us shorties not having much room before we look "too skinny" based on our frame size. I got down to 107 and I looked horrible! I didn't weigh yet today, but I've hit 113 the past few days and even though it's just 6 (or even 5, I was feeling better at 112 too) pounds it makes a world of difference.
Funny thing is, my clothes still fit as if I was at 107-109 range. So maybe I built some muscle in the process!