I had one of the early F-75's I bought used and found some great shallow stuff but I could never find anything deeper than 5 no matter how I set it up . It also had some of the earlier quality control issues . A guy I know ( with a bad shoulder ) hated his SE so
much he traded it to me for the F-75 even though I told him all the issues I had with it . He has since made some pretty spectacular shallow finds with it as well and could care less about the depth issue .