>>24517302 (OP)I'm working on editing together transltions of all the summaries and tesimonia of the lost epic cycle. I've never seen it done before, which is surprising, the Loeb editions come closest which have the summaries of Proclus with some extra details from Apollodorus, but there's much more than what's found in those two sources.
Just finished the Cypria, which chronologically comes before the Iliad. It's probably the best-attested one, so I was able to create a pretty full narrative that leads directly into the wrath of Achilles. The three epics between the Iliad and Odyssey will be difficult because they overlap in subject matter, so later authors either conflated them together or cut out the parts that contradict when they summarised them. I'm using mostly public-domain translations so I should be able to post them freely online.