Bell, Book, Candle after Bill Alexander's Candle Still Life

The candle is 100% from the Bill Alexander still life video. I wanted to add a few elements for interest. What drew me to this subject was the drama of the darks / lights. I'd like suggestions for how to make it better. I'm not sure the knife is working, but it would be difficult to erase. I think I might go back in? IF I do that, would I use just out of the tube oils, or thinned down liquin? What do you all think? This is oil on canvas board.