Another secondhand boat that I bought recently. 30" plank on frame Riva Aquarama, not sure if it's from a kit or a scratchbuild. I bought it complete, except for radio gear.
I had to redo some of the wiring, and figure out a way of securing the two 3s 2200 LiPos. It sits level in the bath, going by the painted waterline.
I took it to the lake yesterday, and it was fine at low speed, but the bow doesn't come up at all as the speed increases. If anything, it digs in a little, so the bow wave comes up over the decking and into the driving compartment.
Is it just a case of moving the centre of gravity a bit further back, so that the bow sits higher, or is it something more fundamental?
There's a small amount of lead right at the back, which I can remove if the stern sits too low after moving the batteries rearwards.
Having built quite a few "foamie" planes, centre of gravity is critical, and clearly marked on the plans/instructions. With a secondhand boat though, I'm relying on the builder having painted the waterline in the correct place, as well as fitting the propshafts at the correct angle, etc.