Proud new owner of a Bass Raider 10E. Currently outfitted with MinnKota 55 and the Striker 4 fish finder. I saw a question posed about transducer mounting on these boats. My solution was to order a transducer pole mount from
Fish Finder Mounts.com. Solidly constructed from aluminum, this mount is designed like a trolling motor. Clamps to the front transom and is capable of rotating 360, Not a cheap option, ($150 US) but should last the lifetime of the boat. Can be easily detached for use on a friends boat or a rental boat. Highly recommend you give them a call. Matt is very knowledgeable about all things transducer ( and will not hesitate to tell you so....lol) and will work with you to make sure you are fixed up right the first time.
3M marine adhesive 3200 is your best bet for sealing anything on these boats. Read about it a 3m web site, but dont get the 5200...problems with adhesion to plastic is the rumor.