Hi Bryan,
I had the Spitfire 0.7 dual circuit m/cyl on my car for a while at one point and there are a several guides on how to do it on the forum.
I know...just refreshing the discussion since it's getting towards spring up here in the northern climes, and pretty sure, besides myself, folks are looking at recommissioning their rides for the season (though, to be honest, I've had mine out more than once considering the lack of winter weather here in MA last winter...)
When I did mine I removed the wedge shape reservoir and replaced it with a remote one from a Land Rover. Apart from having a greater capacity and being easier to see, it also came with a low fluid warning switch. Anyway, the 0.7" cylinder is ok with non-servoed standard brakes so you know that one will work. I no longer have that on my car but I do have one on the Elan, again without servo assistance but with the larger piston P16 calipers and it's fine.
I like the idea of remote reservoirs; only question is the fittings on the MC end to accept the hose from the reservoir in place of the attached piece. Don't necessarily want to get into fabrication of hose fittings and such...any guidance there, sir? That it has a low level indicator is a plus...take the place of the removed PDWV. Always thinking, right?
If you are currently using the OEM Lotus m/cylinder, am I correct in thinking the later Specials had a larger bore to handle a larger rear brake cylinder ? If so, you might not like the additional travel with a 0.7" bore or at least it will take some getting used to. But the big plus is that it's a well trodden path, bolts straight into the chassis and so there's no real surprises in store.
Brian
The question of travel is one to consider. In looking again at the S2 MC, it's well rusted...and thinking it may be past freeing up the piston and returning it to service. Additionally, the top attach fitting is a captured nut...so wondering if that will be a problem...but probably not, because IIRC, both of the studs are the same size/pitch.