I am at the point where you have to put the balsa over the fuel tank area and have a few questions/concerns.

1) I don't like the idea of not being able to get at the fuel tank once it is covered. Once a fuel tank is put in, do you usually never have to touch it again ?
2) The piece of balsa that covers this area has to be bent in the shape of a semi circle, therefore the balsa does not join up with the sides of the fuse properly. Really only the edge of it touches the fuse, and is it ok to just glue the edge to the fuse ?
3) The piece of balsa is actually bigger than the width of the fuse. Therefore do you just glue it then trim it flush, or cut it then glue it on ?

Thanks