What response times I should expect

[DeeB]

I tried the dtoverlay addition in the config, rebooted and that didn't help (I think)

I went into openCPN and played with just about every setting I could find (I know, terrible idea) and it's now working as expected with smooth scrolling. I'm upset with myself for not keeping track of what I changed, so the next person would know. But there was some magic setting within OpenCPN that allowed for smooth sailing, I mean scrolling.

Thanks for the other settings as I'm sure they helped too.