I'm thinking of buying an LR60. Are you guys really happy with the grade you are able to keep with this detector? Is it realistic for me to believe I could dig to +/- 1/4"? I'm really anal about my grade and am rarely satisfied with how promptly and accurately my grade guys give me information so I can make the most of my time. Will this unit slow me down enough to tick me off while checking? Are there any situations where this detector doesn't work very well. How about when digging septic tank holes? I hate (like everyone) to spend money and be unsatisfied with the result. Case in point.... when I bought a magnetic detector maybe 15 years ago not realizing I wasn't going to be able to tell if the stick was plumb! Easy to be inches from grade. Any light you folks could shed on the subject would be greaaaaaaat!