Looks great! Now time to catch some fish.
One suggestion here. Your trailer needs a bit of attention. It is a bit too short for the boat. Here is why that is important. Especially once you get an outboard, a large majority of the weight is pressing down on the transom, or at least, it is close, with your stern battery and such. So, unless the bunks extend past the transom, the boat may develop a bit of a hook in the bottom shape. A flat bottom is especially prone to this, due to its shape. Extending the bunks that far probably wouldn't help that much, as the wood will flex with the boat.
Probably are going to wanna extend that tongue a bit. Do those trailers in a box have a bolted on tongue? If so, you just need to get a longer piece of steel, paint it, drill a couple holes, and bolt it on. Most steelyards will cut it to your exact dimensions.
One suggestion here. Your trailer needs a bit of attention. It is a bit too short for the boat. Here is why that is important. Especially once you get an outboard, a large majority of the weight is pressing down on the transom, or at least, it is close, with your stern battery and such. So, unless the bunks extend past the transom, the boat may develop a bit of a hook in the bottom shape. A flat bottom is especially prone to this, due to its shape. Extending the bunks that far probably wouldn't help that much, as the wood will flex with the boat.
Probably are going to wanna extend that tongue a bit. Do those trailers in a box have a bolted on tongue? If so, you just need to get a longer piece of steel, paint it, drill a couple holes, and bolt it on. Most steelyards will cut it to your exact dimensions.