My videos are with webcontrol, but the sound isn’t too great (sorry). There is some reading on webcontrol here with links to videos there as well.
Sled not keeping up is for when your motors move and the sled gets caught. I think this is a good thing, but it is too sensitive by default. There is a setting you can change in the advanced menu. scroll until you find it and change it to 20.
Please check out those videos and if that doesn’t help, send me a message.