Pro tip: skipping the string line on a 12 ft garden wall actually worked better for me
I had a 12 ft run of block on a low garden wall last month in Akron and on a whim I laid it to a tight chalk line with a 4 ft level and no string at all. I kept waiting for it to drift but it came out dead level within a quarter inch over the whole run. I think for short runs the string just gets knocked and lies to you more than it helps. Any of you lay short walls off a line or do you always run string no matter how small the job is?