Hi guys i have run the boats now the 3.5 ran like a dream. it was so sweat to drive i had a ball. the 7.5 well after i i had the fly wheel fly of on starting it got thrown into the wter to see how it would go any way. it ran 10mtrs and spun and started not float as much i am looking at the dumas kit for the 7.5 id like to give building one ago. what glue do you use?? pvc or apoxy type?