Symptoms of bad LCAs?

[speedyspaghetti]

Hey everyone,

So good news - my Boxster is finally enjoyable to drive again! After months of tracking down an infuriating vibration, I successfully remedied about 90% of the issue by installing new struts, mounts, track arms, trailing arms, and tie rods. I was able to do all the work myself thanks to the awesome knowledge from this board, so first of all, thank you to everyone who helped!

Secondly - as I mentioned, the issue is 90% gone, but there still is a bit of vibration and slight understeer noticeable. The only things I have not yet changed are front and rear LCAs, rear track arms, and rear drop links. Everything else in the front/rear suspension is new. I'm considering doing the front LCAs since they are relatively cheap (~90 each from Meyle) and shouldn't require an alignment. Could these potentially be the culprit from my last 10%? Before anyone asks, tires are brand new (Conti ExtremeContact DW) and alignment has been done.

Thanks again!