Group-Bourdon Tool v2.0

The GBT practice aid is for Windows PCs and is a free download available on the Railchat Forums by clicking HERE

PLEASE NOTE:  If you are not a member of Railchat you will need to register (for free) before you can download the tool.

If you haven't registered on Railchat already then it's well worth doing so, especially if you're hoping for a career as a train driver.
On Railchat you'll find knowledgeable people, many of whom are drivers, and lots of useful information on all aspects of the railway.