Hey guys! As stated in the title I, the newbie, won the combo off of ebay. Now the reason I started this was to ask all you godlike bassists as to what I should check for in the amp. The owner stated that it is 6 years old and the warranty is gone now (sadness). Not only that but he has mentioned that he replaced the old tubes with some other ones. I'm just wondering what should I look at to see that everything is a-okay and not damaged or wrong with the amp. Also I heard that there is a newer version of the Walkabout with new features as well as some report that Mesa's Walkabouts could potentially damage the speaker in select serial numbers. Can someone fill me in on these? I would appreciate anyone's advice whether you own the amp or not--even basic tips to ensure that the everything has a long lifetime. Thank you all! Perhaps your guidance will ease my ignorance for I can't stop thinking about the amp to come.