That's where the problem starts - people wanting to use this part or that part. Honestly, the stock FLCA suck swollen donkey balls. The inner bushing is horrible because they move forward/aft as the arm moves, so it binds up if you have something reasonably stiff(urethane), or you have to make do with a soft squishy bushing on the inside.
The stock upright also has the balljoint really inclined - most likely to keep 300k mile cars with the stock balljoints from popping the joint apart in corners. The incline loads them in a downwards axial direction with cornering. That's not really how you want to load a spherical bearing(you want pure radial), so I was thinking of making the arms with no incline to the balljoint. Which brings me to the arms... I already have some arms, but if I'm getting crap made, hey, why not toss some more parts in there...
Plus there will be more adjustability on the roll center and track width with the arms.
I plan to build some adjustability in the upright, so I might make the lower balljoint portion modular, but that might make the machining a bit more complicated. Although the volume is low enough, and that's a pretty minor change(taper angle), that I'm thinking it could probably be custom machined for each person. But I would strongly suggest ditching the stock arms.
The $1800 price is after you include hubs and stuff like that I'm thinking, and on the high side. I'm thinking I could reduce the cost a bit with some creative design.
Think of it this way, most people have 5 lug hubs already - sell those for a couple hundred bucks and you're already most of the way towards buying BRAND NEW NISSAN hubs.
And mmdb, of course I'll be working with Mike on this. He actually approached me ~6-8 months ago and mentioned the hubs, and I really didn't think there was enough market to make it worthwhile... but I've been in a designing mood lately so I thought I might give it a shot.
I don't expect these uprights to weigh much less than the stock steel ones, but they will be WAY stiffer, and will have some cool features built into them.