Thanks again everyone!
Someone used the term "fingernail catch" to describe the slightest deviation between to adjacent boards... Even with cauls I have found it difficult to entirely eliminate such deviations so I use a hand plane and card scraper to knock down the worst of them.... but I think I must be tilting the sander to more quickly smooth such areas, thus causing my swirls.
I am due for new sandpaper anyways, so I have an assortment pack of Abranet on the way, and will give the Bosch routers more opportunities to succeed as I use the new paper and carefully watch my technique.
I will also look to spend more time with card scraper and hand planes.
AND, starting with higher grit.
I'll report back
- Bob R.
Collegeville PA (30 minutes west of Philly)