We have a SL32.4.2ai which we purchased about 2 years ago (new). I didn't realize it was obsolete when it was purchased. However, we are in need of an RM box up at the stage. We have found a couple of places that actually still sell the RM16ai. I also found an RM32ai on our local Craigslist. I was asked if it was possible to daisy chain two RM16ai units together while using the SL32.4.2ai mixer. I've seen posts about daisy chaining just the RMs together, but haven't seen one in regards to a SL board as well. Thanks.