I've been using a BagEnd S15D for a couple of years now and I've been very happy with it. I've developed a bad back and need to cut down the weight of my equipment or give up playing. I really like the size of the S15D and was hoping that I could cut down the weight by putting in a Neodymium speaker. Can anyone help me with the following questions: 1) Does BagEnd make a neodymium speaker replacement that I can put in the S15D? 2) What are the specs for the stock speaker in the S15D? and 3) Will a Eminence DeltaLite 2515 or Celestion BL15-400 work as a lighter speaker replacement? Thanks in advance for any feedback.