Originally Posted by Dolphyngyrl
I did my very first lap quilt SITD, was new to quilting, no practice, came out nice, if your lines are good do for it.
I agree, go for it. Or, if you are unsure about being able to stay "in the ditch", you can use a slightly wavy line crossing back and forth over the ditch. Looks nice, has a similar effect, and doesn't need to be quite as precise.