Web Control, Firmware and Mega 2560 Maslow Arduino

I am almost there!! I have been able to get WebControl working on my ancient Win7 laptop, wiped the eprom, installed the Holey firmware (in WebControl), entered the appropriate data in the “Quick Configure” window and marked and measured the chains using “Set Sprockets and Chains.”

Instead of proceeding to the Holey calibration, I just wanted to do a simple test cut. I loaded a g-code file and pressed “Play.” The sled proceeded to the cut start and stopped.
An error something to the effect of “Sled Cannot Keep Up” (sorry if this is a bit wrong - I am miles from my machine).

I saw this post: Feature Request: SNKU Warning and Alarm about a setting change.

Am I correct the setting for Position Error Limit under Advanced Settings should be set to 20 (instead of 2)? Any other suggestions would greatly be appreciated.