I have read it is possible to swap a 2007 (SR) screen assembly with a 2008 (penryn) screen assembly with minimal fuss. Extending just a couple wires. The 2008 is LED where the 2007 is CCFL. I noticed there is a little pixel gain. Will LED extend battery life much? And Im not sure it worth it myself with the hassle. Anyone else upgraded theirs to LED. Mine is working so not looking to mess until it fails.