Kei: I've never tried Wyvang RSF/RB in LTD once, so I'll take your word for it.
As far as adding Samurai to Wyvang for Attack, I can understand adding it for the stationary customs you were talking about since they lack momentum and could suffer from recoil problems, but I really think Shinobi and Gladiator would work better for pure Attack. They have the same weight, so Samurai doesn't really serve to reduce recoil by any means but its smooth shape, which, even if it does provide some safety in a collision, takes away from the Smash Attack of the combination, which should be prioritized over recoil control when constructing an Attack custom (unless the Attack custom actually has glaring recoil problems, but I don't think that's the case with Wyvang).
As far as I know, Wyvang doesn't have too much trouble with recoil, so I think substituting Samurai for Gladiator or Shinobi would just be trying to fix a problem that isn't there (not to mention it takes away noticeably from Wyvang's ability to handle taller combinations, including F230CF/GCF customs).
Wombat: Yes, I completely forgot Uranus. I will add that in. Thanks for pointing that out.
As for DK LTAC customs, I'm not too sure - I tried them, and yes, they had some extraordinary smash against 145-height combinations, but pretty much only 145-height combinations (that is probably the most prevalent height in the format, but still). I also had trouble with recoil control using them (that may have just been me, but there are other options for taking out the same target that have less recoil trouble). On top of that, Omega does their job worlds better, and simultaneously runs over all other heights like a train.
Of course, I could be wrong; they do have some excellent smash against certain things. I'd be hesitant to list them, but hey.
Cake: That's something I actually wanted to bring up. th!nk was opposed to listing Libra as competitive Stamina when he was still here, and I've heard accounts from multiple old-timers suggesting that Earth and Burn out-do it pretty solidly. There seem to be two sides of the issue, though; I've heard multiple people say what you're saying. Perhaps its due to manufacturing variation or something of that sort.
Kei, what do think about Libra for Stamina? I don't really have a preference personally (in fact, I haven't tested Libra for Stamina all that much - I went mostly off of what th!nk told me about it).
I went and found what appear to be the only Stamina comparisons for Libra in the LTD subforum:
Justaways testing here:
http://worldbeyblade.org/Thread-LTD-Libr...pid1187448
The Supreme One's testing here:
http://worldbeyblade.org/Thread-LTD-Libr...pid1222614
In Justaway's mirror testing, Earth wrecked Libra, but in both sets using Libra Bearing Drive, Earth lost.
It could just be because Bearing Drive is a great Stamina part; or it could be because Libra works really great for Stamina on B:D. We could use more than 3 sets of results form two users, though (multiple users should probably test it if they can, since it seems like people are getting totally different results from each other and it could be due to variation in the Libra Wheel itself).
List was updated;
Uranus added for Screw Attack, and
MSF-H Samurai Wyvang [Crystal-Up] R145 (RSF/RB) added for Wyvang Attack.