How about this:
Quote:
The Quest of the Silmaril 2
...
Thus Thingol learned that Lúthien was again fled, and that Celegorm and Curufin were driven from Nargothrond. <In that time Celebrimbor the son of Curufin repudiated the deeds of his father, and remained with Orodreth.> Then his counsel was in doubt, for he had not the strength to assail the sons of Fëanor; but he sent messengers to Himring to summon their aid in seeking for Lúthien, since Celegorm had not sent her to the house of her father, nor had he kept her safely.
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I think it desirable to retain in some way the mention of Celebrimbor repenting of Curufin's deeds, since it is hard to incorporate it into the Lay itself (unless you already did that).