Is this from the eyepiece-side? ( I suspect three spacers at the other end)
Never mind, my old Master would give you an "A".
It would be an interesting experiment to baffle the dew shield too.
Not very long ago an opticien wanted to show me some children's fingerprints on the corrector of the 14 inch Meade of the observatory. He pointed it out with a rather bright light. Meanwhile someone was observing through it; he didn't notice it. I didn't believe that and wanted to see it myself. I could not. The light was effectively put on hold by the inside baffle. He told me the wisdom "As long as the incident light doesn't reach the eyepiece, not much harm can be done."
I am not sure if baffling the dewshield will have noticeable effect.