That screen shot is from version 2.0x . Go download the latest version. There is also a setting in the (settings screen) called something like angular velocity cv, it is close to the reset button it has two boxes one for entering degrees and another for entering speed and a button to enable it. this does what you are looking for, it will slow the machine down to the speed entered on any angle above a certain degree.
On a side note, i have some questions about your laser. Could you post some pics and a description in the show and tell section?
Thanks,
Chad