Question Kangaroo X2 serial commands missing speed setting

Hello xsim community. I'm trying to figure out an issue that's been a minor annoyance since building my 2dof seat mover a few years ago. This occurs in both Simtools V2 and V3, so it is either a mistake on my end or a bug in the serial interface code.

For context, I am using a Kangaroo X2 attached to a Sabertooth 2x32 with quadrature encoders on my DC gearmotors. Motion works great and I've been using the setup for years.

The problem is that when the startup string is sent to my rig, the motors move at full speed from the machine home position to the software home position, ignoring my command to move at a slower speed. This isn't a huge issue, but the movement is a bit violent and stresses my PSU. The following is my copy-and-pasted Startup String:

1,start<13><10>1,home<13><10>1,units4095=5100<13><10>2,start<13><10>2,home<13><10>2,units4095=5100<13><10>1,p2550s1000<13><10>2,p2550s1000<13><10>

Broken down with comments this is:

1,start #Start motor one
1,home #Set motor one home position at current (resting) position
1,units4095=5100 # change scaling units for motor one
2,start #Start motor two
2,home #Set motor two home position at current (resting) position
2,units4095=5100 # change scaling units for motor two
1,p2550s1000 #Move motor one to position 2550 at speed 1000
2,p2550s1000 #Move motor two to position 2550 at speed 1000

The last two lines are where the problem occurs. What appears to happen is the motors move to position 2550, as instructed, but do so at full speed rather than at speed 1000. Interestingly, when I issue these same commands through a serial terminal the speed limit is obeyed.

Any ideas would be appreciated. I wonder if the position/speed commands are getting malformed in the simtools interface... or maybe I'm missing something obvious. Is there debug log that shows exactly the serial commands sent?

Thanks.

Thanks for your reply. I didn't realize V3 had built in centering and parking. I will still need to use the startup and shutdown strings to turn the motors on/off and change scaling units, but I'll test out leaving the positional commands off.

Thank you from a fellow Oregonian!