thx for the replies and suggestions. i will defintly get the chart speed down. the xducer is factory that came in in box, the xnt model. i looked at that xducer wilbur has for sale. thats a really good price considering what HB wants for it alone. i've got a lot of learning to do w/ this si/di. but i did see a big difference in SIM MODE when i decreased the si down to 50 ft. i also adjusted max depth to 50 ft on 2d and di and they are showing alot better. it looks alot better quality and images are getting clearer. i need to get it to the lake for more testing, but too cold and the water is very muddy from all the rain. i just hope the RFI stays out once i put it in the water. thx again, rick