few years back I installed a raymarine c80 with 4kw dome gps ant. and the dsm 300 the one part i never finished was the transducer i got a in hull but when moveing it around to find a place it just never read right. I have a thru hull (large) that use to be used for a furuno crt was thinking of haveing it removed and a new one for the raymarine put in its place any thoughts on this.? Also what would you think this would cost me???