I know Richard Binder tests all new pens before shipping. Does anyone know if he offers this free service with additional nibs that are purchased as well?

Richard may kick in and answer but I imagine he would do anything you wanted along these lines. He makes a good product and stands behind it!

I have a regular, boring old two-tone 14K F from Richard, and it's a delight. I believe Richard checks every nib that leaves his shop, period. Best,
David