there are alot of good upgraded T plate kits for the t bar cars.there is only 1 that i know of with a battery strap and that is the PRC quad 12.i personally dont use battery straps because 1/12th cars do tweak easily being that they dont have any structure to them but the quad 12 is not supposed to tweak the chassis from what people say that run the car.we offer a 1/12th chassis conversion for the T plate cars and we are working on a whole new car that will be a mix of link and T bar.Hyperform,CRC,IRS,and a few others make conversion kits that are also for the T bar cars and they all work well from what i have been told.here are a few pics of what we are offering.im sure the other companies can post pics also so you can get a good idea of whats out there.you will really enjoy the 1/12th class buddy.there are alot of people up here who can help you out with any questions you have.good luck.