How many times did b&r: tc get new restraints?

While viewing pics from another forum, I started to notice all of the different  restraints both Batman and Robin: the Chiller had. I know when they first opened, they had very slim restraints, almost similar to those on an arrow only with metal handgrips. Then, I think they changed them and put on a more padded restraint because of the complaining. Then, they changed it again and put on the huge premeir otsr with LOTS of padding. These were the last otsr's either of them had. And finally, they are now being fitted for lapbars. Can anybody confirm the second change?  
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I remember back in 97 when i rode it that one time it had like you said difrent type of harnest they where more thin and had less padding on them with large handles.Then the next time i rode ,it was in sept of 98 and it had a little bit more of bigger harnest with a very thing layer of padding and a black peaice of materal over the top tied like laces on shoes.The when i went on it again in mid season 99 they had just kelpt the same harnest i belive and just but a whole lot of padding on it. so i think two difrent types but a veiw changes.But i alwaysed wondered the same thing? how many difrent types for sure? im just going by the best of my memory.

In 97 It had very thin OTSR with nothing but a piece of leather.

In 98 It had a thick very hard OTSR.

In 99 It had thick hard OTSR.

In 00 Robin got a padded OTSR and Batman remained w/ the hard.

In 01 Robin had lap bars and Batman had padding.