I am about to ditch my MES 40 after being tired of watching it struggle to hold temps and constant issues with getting the right smoke. I had a couple questions about the SI brand... I am looking to buy the 3D. Can i leave it outside in the rain and not have to worry? Am i able to use my amps with it? How easy is it to clean? Am i better off buying a gen 1/3 MES 40? Thanks!