Need help with BLTOUCH and Probing please

Hi all. Yes first post asking for help :)

With help I've built a D-Bot [www.thingiverse.com]

We fitted a BLTouch using the latest Marlin Bugfix.
If I do a G28 or G28 Y-X-Z all is does what's it's supposed to do.

But when I do a G29 the probe comes to the front left and work's ok.
After that the probe moves at a snails pace then speeds up and starts to move towards the front hitting the
printers front cross member.

I've tried to follow you tube videos on how to set the bed probing but I'm having no luck.
Could someone take a look at my Configuration.h file and tell where I'm
going wrong and how to fix it please?

Thank you.

[www.dropbox.com]