The Bat at KI was the first of the concept and failed mostly becuase they had no clue what they were doing when designing and building it...The Bat when first built had no banking to the track, which cuased major problems as the trains would travel to there swinging limit. It was not fun!
A-HA! That's why the RCT series don't have banked tracks for the swinging suspended coasters!
Tennessee Tornado is one of my favorite roller coasters! It's such a shame these newer mega-loopers never caught on. Rides like Tennessee Tornado could have saved Arrow in my opinion.