I am new to Talk Bass so apologize in advance if this isn't the right way to ask for help... I am trying to get all the specs on a Pedulla Thunderbass ET-5 that I own. I have gone to their website and checked out the model number and it appears it was made in 1996. All of the recent models however have four control knobs and mine only has three. I am attaching a photo and if anyone can help or just direct me where to look for help getting all the specs I would appreciate very much!