newbie questions re A Arm designs?

[danilo]

Ahhh .. Thank You sir. A clear explanation.
Being in Canada there are NO sierras of any description so I'm spared that at least. Regardless, the Authorities prohibit ..any.. adulterations to uprights .
I do have Spit bits on hand though :-).
But the uprights would /will need bespoke stub axles to allow the use of Moderne 100 mm PCD wheels/brakes etc., as I want nothing to do with TR brakes/wheels
Bit of an expense/runaround to make workable, but then those things are 1/2 the weight of even the Miata uprights... Plus and it's a biggie, I already own them.
Sooo.. If I use the improved uprights then I can also build Caterham A Arms or simply buy the rascals ( a bit pricey, tho they do come complete)
Bit of bracketry redesign needed as well.
Seemingly nothing is simple, is it?