I have a new(old) 22ft glass boat. I run a 295 with two transom mount transducers, a 2kw 200B-8B and a 1 kw 50B-6B from my old aluminium boat. I have always had problems with interference and now with the glass hull i am thinking of using in hull wetbox setup and upgrading to a 2kw /50.Will in hull give a better picture at speed?. At present I loose bottom at 12knots. Is the airmar 299 in hull better for this size boat ?? I bottom fish between 100m to 700mtrs for cod etc . Any help would be really appreciated .