Rusty,I agree with Hatterasguy.At this point I would to take this car to someone who is familiar with it.You having to advise him what to look for does not fair well with his basic knowledge of your 350sd.You may have allready spent more money and lost driving time by using this shop.The tensioner on the 350sd is about as basic as it can get ,installed incorrectly it could lead to major major problems. Perhaps someone else here can recommend a good shop in Vegas that can get you back on the road again quickly. ( as you mentioned being a professional musician ,hands on is not an option on your part ) . As always Good Luck

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85 300sd SOLD ,85 745i,95 740i,1972 Suburban,1938 International