Those look pretty good—the only thought I’d offer is that you might want to slow the pencil finish down, to make sure it’s right on the money. 20-24ipm has been working well for me in Poplar.
One of the things to remember is that you can intuitively adjust your speeds based on the machine’s behavior when cutting. If it’s squealing a lot it’s likely that it’s rubbing and traveling too slowly relative to the spindle speed. Blackened wood or molten plastic edges are also a sure-sign of this. If it’s throwing out dust instead of proper chips? also too slow.
If it’s tearing out the wood, jumping around, losing position, etc… or ripping chunks out or cracking plastic, then it’s probably going too fast
You’re looking for decently sized chips that indicate the right amount of tool engagement, and it should be a fairly uniform buzz when it’s cutting. I’ll try to take some pictures of the results of happy cuts vs. too slow cuts for reference sake.