Pontoon:
I've almost finished the right one too, just needs some triagular support beams and the rear underside covering. In hindsight, I should have made 4mm covers instead of 2mm. I didn't realise 2mm would tear so easily. Still, when its fibreglassed that will not matter.
Something nice is just how easy thin plastic will bend, unlike balsa. This was a daunting task on my previous, wood Northstar, but here it was a breeze. In fact, the general ease of working with ABS (especially how fast ABS cement sets) is making this entire build a breeze.
I'm going to redesign the fuselage bulkheads to make the end result more like Yakdude's model with its 30* sides. I've also been thinking about increasing the width of the step to help with water stability.
Wing mass so far is 784 grams.That's 1.7 lbs.