Hello, I've read a lot of messages in the forums and it seems that most people agree that the S4 is generally the better product to buy for a fixed focus ellipsoidal. However I'm in a situation that I'm not sure how much of a final word I'm going to have on which get's purchased. I'm concerned about a comment I read that said the SL is likely to burn through gel quickly. Has anyone else found this to be true? Thanks for the help, this is my first post here. It seems like a great community and I hope I can contribute something to the discussion in the future.