I bought my first humminbird SI unit after getting rid of my 2 HDS 7's and I really like it.One thing that stood out is the regular sonar is way better than anything ive seen.Im pretty amazed at the SI and DI to.But my reason for posting is to get some input on how I need to adjust my SI and DI to get the best picture.I passed over a couple of small trees that I put out and could find them easly with sonar/DI but they were sort of faint on the DI.I couldnt make anything out on the SI.Then I went over one of the few pieces of standing timber in the lake and made it out very clearly on all 3.Does it have to be a pretty big object to make it out clearly on the SI/DI?I am very pleased with my new humminbird units.