Eureka! Got a 45 min cut with no slippage! (kept clothes on). I am very new at this, so learning, experimenting…amazing how many parameters one should consider and trade off, and now add one more - the holding power of a Makita router collet. There is always a limit for everything. Detail: Sienci chart indicates 150 ipm for this TBN mill for carving/detailing for hardwood, so trying to be “conservative”, I started at 130, then at 100 - slippage on both. Today, ran at 65 and SUCCESS! I have no doubt that I am creating flour instead of chips in some areas, however, the prime objective is to get the result I want. Downside, of course, is that it will take much much longer to cut a project. Am impressed with GSender 1.5 capabilities to stop/restart a job as well as changing feed rate on the fly.
Since I have ruined this project and still have more cutting to go to completion, I have one more area to experiment with. I indicated earlier that I bought a router from Carbide3D with an ER11 collet. I plan to install it, and then try the higher F&S.
Will KYP.
Many thanks to all of you for providing ideas and suggestions. I am grateful we have this forum.