advice on re-core fuel cell hatch

[wellcraftv20step]

The little roller they sell to aid in removing air bubbles and shaping the mat on contours is very helpful, and as far as the hatch holes ,it's important to keep the hatch flat when you apply the core but try not to let the resin-drip through the hole and seep back onto the top side of the hatch cover, I taped around the opening, good thing I did! Hope this helps some.