as you say mike, bj's should last decades, just mulling over all possibilities really. joints will always be available, but if they're some big secret and companies stop trading in the future, could prove a hassle. s'pose you buy an extra set just to be on the safe side, dunno?
i like the t2d setup, would solve my problems with clearence issues due to my spindles. but if i went this route i'd have to fit adjusters too.
as i'm sure my cut/twist + their spindles would be slightly lower than it is already is, i recall my spindles being about 2.75" drop somehting like that? i have tubbed arches, but the beam would be just too low for any practicality.
if i'm taking my beam off to fit adjusters, i'm narrowing it too. you then have to evaluate the diy route and buying one already done. diy is cheap in materials, but not time. 500 isn't a lot really for what you get; narrowed, adjusters, bearings, bushes, etc. i know which i'd go for.
from my reckonig the cost of t2d setup is comparable to a set of brazillian KL spindles (discs brakes) and new king/link pins, o.k you gotta find some trailing arms, but they shouldn't be too much? so there isn't much in the cost of a trik beam + t2d setup and a trik beam + KL setup? t2d is great for a mild hassle free lowering job, if affordable.
for me probably the deciding factor is the dependancy on a sole/limited provider for new/replacement bj's.
i'm sure a contributing factor to bj's replacing kl's would have been cost. bj's may not be as good as kl's technically, i read they weren't, but i don't know? but i bet bj's were much cheaper to produce/implement. no more messing about machining/shimming/tolerances etc. just get 'em pressed in and bolted up etc. time is money in manufacturing, yeah?
haven't even mentioned wishbone/coilover setups, which i'm sure are far superior, and work out cheaper maybe if considering a whole new front? personally i just don't like the idea of it. for me it needs to be close to indigenous.