I used to use a pirhanamax unit with the same transducer. I used 1x2 to male a T shape 12"wide at the top and about 18" long. Mounted the transducer on the bottom and set the whole rig in the hole. I put the 1x2s together with a single bolt and lock washer so they could swivel for a little more compact storage. It worked well until it got caught on something in the sleigh and ripped the transducer cable. You can get an ice ducer for $80CDN here, probably $60USD and it's less likely to break since you can store it wrapped up with the unit. I now use the same unit as you in a portable bag with an ice ducer.
