I'm not sure we're on the same page terminology wise Hammer. Normally an inlay is a strip or pattern like a rose or fleur de lis of contrasting wood(s) into a wooden surface. That doesn't sound like what you are trying to do. Is there an example you can post or a sketch? As long as it comes from your hard drive you don't need 10 posts.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.