You not only need a CADI tool you need the CADI with global software. I have worked on many of them with out the CADI (however I adjusted 40 TXR5's wich are similar). They are good equipment as any thing else if its been put in right. The draw back is the big "S" will hammer you on the parts. If you have a very good working knowledge of the TXR5 you should do fine. Good luck.