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Buckaroo is actually fairly easy to get (research wise) so long as you can find Necroplane Parts and Old Earth Books (usually not a problem before month 5), so I used it for a long time, I actually met the prereqs before I got Car Thieves. You do need to shoot down a couple of bombers for the parts which is another thing, but that's also usually doable. Pirate Radio can take a while after all.
But you are right in that if you do happen to find a 25mm from a Wasp Aircar, and can pop it on an early craft with an LT slot, it's going to be very good. Though it again suffers from needing [Cannon Munitions Preq.] for it's ammo, which is weirdly tied to just Light Cannon or Auto Cannon, VERY rare drops early on to the point where you want to save scum a Gun Almanac for it, but if you do you can make your 25mm rounds probably earlier than you can buy 14mm.
I'd actually be fine with Junkyard: Contacts being tied to Steam Power and Flintlocks & Bombs instead of Workshop, still nearly as many prerequisites: just missing the two BIG offenders of chance, Durathread and Guild Stapler.
Speaking of which, is it time to bring up that elephant in the room: the TIGER is an F-14 (the Macross version, even, in
the XPedia picture) but can't use any missiles (lol).
Macross Missile Massacre is a big anime meme lol. Almost as much as I can't stop seeing Illyasviel (Aurora) and
wondering where Berserker is, lol.
(double NSFW warnings for TVTropes and Yande.re, not specifically for these links as they're safe, but... just in case you go exploring )