I never realised until watching “The Lazy Eyebrow’s” review of the Earthrise seeker mold that Starscream (and therefore Thundercracker and Skywarp), has a small peg behind the joint of where the knee bend is located. Once the peg is pegged into a slot inside of the leg, the knee bend joint ends up being more secured and not prone to being floppy (at least on my copy). After discovering this, I went to check on my copy of the instructions, and that peg was not even mentioned (visually) in the instructions. Is it just me or did most people didn’t know about this? (Even the lazy eyebrow didn’t know that this peg existed until someone commented on one of his videos on YouTube that this tab existed).

Link to video:
( the exact timestamp where the lazy eyebrow mentions this peg begins at 18:46, during the transformation section of the review)