Float mark 2

This model is designed similar to an inflatable boat, to avoid a float filling with water the bottom is opened and seals agents the water creating an air pocket. Max carrying weight is 50 American pennies. The boat is 70 mm at its widest point and 92 mm long .
Problems:

1. top is to thin and do to an imperfect print is not air tight .
2. Long print time 135 minuets
3. not enough room for coins in coin tubes

Improvements from mark 1:
1: proper sized coin holes
2 improved carrying capacity by 39 coins
3. reduced print time by 30 minuets