TS3 is an excellent design. I wouldn't worry about your design looking too much like TS3, all bots have similarities. The main improvement to that design is to enclose the weapon less and have it project as far out the front as possible. Having the top and bottom panels come out to the front is a bad idea as they can easily be bent and catch in the beater or 'high side' the bot and stop it moving. Making the beater diameter as large as possible and having it stick out as far as possible helps your bot attack other vertical spinners before they can contact your bot.

As well as TS3, have a look at Conker 3 and my own vertical spinners here: http://www.robowars.org/forum/viewto...=74&start=5955 - not quite your design but there will be ideas you can adapt.