Have had a new pine staircse fitted intending to paint and carpet it, but I'm not happy with it. The fillets in the base rail between each baluster protrude 1 or 2mm above the rail whereas I would have expected them to be flush with the rail. They came with the staircase and were nailed and glued in place as per instructions, but look most untidy and uneven. Is this normal? Is there anything I can do to get a flush fit? Can I sand off the protrusion, use lots of caulk... all sounds like it will end in a mess. How do I get a good finish?