looking to replace my r199 transducer, low frequency has shit the bed and I'm looking to replace it this winter. I fish anywhere from 10' to 2000'. Need to read the bottom up to around 600' or so. But when offshore generally only looking at the top 200'. I would love to do a tilted element and not have a transducer hanging off the bottom but not totally against it. The tank I have now is old style bolt pattern I believe so it's not as easy as just buying a new r199 and bolting it in. What do you recommend? Thanks for any info.