Thanks for bringing up this topic Fond Du Lac. I agree that the dreaded brown spots don't look good in areas that we detect in & I'm glad to see that there's some very good, pertinent information being discussed here. From what I've experienced with my Northern WI sandy soil, if the conditions are hot & dry. The odds are already stacked against me for any favorable results, no matter what I do. I always use a horse shoe cut while leaving a flap/hinge on it & I dig a couple of inches below the root system for a deep target or just a slit in the ground for a shallow one. I then aerate the replaced plug & surrounding area. I used to use my Lesche tip for this, but that seemed to be a bit excessive. I now use a "T" handle pick that I made from a worn out torx driver & I've had good results with this method. I worked for a landscaper years ago & he told me that a plug or damaged grass root system will rebound much better if it's heated up or stirred up a bit with aeration. I've also read about people sprinkling a little fertilizer in the hole & then splashing the plug with some water. I don't know how well this method works though. Through some trail & error, along with using a little restraint if conditions are not conducive, hopefully we'll come up with some ideas or solutions that will have a lasting effect that's positive for this hobby that we're all hooked on.
With this being said, no matter what, there will always be detractors that don't like what we do, regardless. Case in point... I was detecting a park the other evening & an older woman was there with her daughter. With my one ear peeled, I over heard the daughter talk about how conscientious I was & what an excellent job I was doing with covering my holes. The older woman loudly replied, I don't care how good of a job it is, I don't like what he's doing & that I had no business digging holes in the park. After this, she proceeded to take another huge drag from her cigarette & then blew it into my direction. I just smiled & kept going about my business until they left. HH!
John