The K-tag (also often spelled Ktag) is probably one the most extensive bootmode tools on the market, you can read and write a large series of different processors. For every ECU type Alientech made a very nice connection manual. The connection demands not much soldering skills and for most of the ECUs Alientech has developed probes which makes the K-Tag the easiest to use boomode tool on the market. So don’t worry about connecting an ECU in boot mode because with this tool it is really a piece of cake.
If you need a reliable, versatile tool, produced by one of the most revered companies in the world, that enables safe tuning of a huge number of ECUs, Ktag should be your choice.