-- this makes sense for iron pipes - lead plate used for solder
util.add_ingredient("pipe", "lead-plate",1)
util.add_ingredient("pipe-to-ground","lead-plate",1)

-- This makes more sense to me. Still should use iron plates but use lead plate for solder
--util.replace_some_ingredient("storage-tank", "iron-plate", "lead-plate", 10)
util.add_ingredient("storage-tank", "lead-plate", 2)

-- my car battery casing is plastic or rubber(?) so I added plastic
util.add_ingredient("battery", "plastic-bar", 1)
-- replace iron with lead makes sense here
--util.add_ingredient("battery", "lead-plate", 1)
util.replace_ingredient("battery", "iron-plate", "lead-plate")

-- I think I will keep iron for the outer case and add 4 lead plates for shielding (maybe I should be using steel instead of iron ?)
--util.replace_ingredient("uranium-fuel-cell", "iron-plate", "lead-plate")
util.add_ingredient("uranium-fuel-cell", "lead-plate", 4) -- for inside the battery and/or shielding

-- nope. I added lead to the ammunition as shown below
--util.replace_some_ingredient("gun-turret", "iron-plate", "lead-plate", 5)

-- not sure why, but why not?
util.add_ingredient("big-electric-pole", "lead-plate", 2)
util.add_ingredient("substation", "lead-plate", 2)
util.add_ingredient("electric-furnace", "lead-plate", 5)
util.add_ingredient("solar-panel", "lead-plate", 5)

-- bullets and/or magazines will contain both iron and lead.
-- ammunition
--util.replace_ingredient("firearm-magazine", "iron-plate", "lead-plate")
util.add_ingredient("firearm-magazine", "lead-plate", 1)
util.replace_ingredient("shotgun-shell", "iron-plate", "lead-plate")

-- todo
-- circuit boards - need to add lead for solder (No ROHS here!)
-- circuit boards quite often have HASL over the copper traces to make it easier to solder components
-- HASL stands for Hot Air Solder Layer
-- (For both copper traces and edge board contacts on older simple circuit boards. Higher level
-- boards would use gold for plating the contacts like for the PCI edge connecters in a PC. The rest of the board would still use HASL.)

-- If you add Gold as a resource, the gold might also be added to Advanced Circuits and/or Processing Units for the circuit board contacts.

-- oops!

Glad you are able to customize like this!

I like the idea of adding led to Advanced Circuits as a solder, but i don't want to over-complicate for the base "vanilla+" mod. I'll think on this one.

Now I am tempted to add Solder. Sounds Good. I dont want to go all the way to Bob's with this. It's good though to have a simpler set of mods between vanilla and Bob's.

Haha yeah I know what you mean. The optional intermediates in Silica & Silicon mod have proven to be pretty popular, so I'll consider perhaps adding solder and lead expansion bolts as optional intermediates to this mod. Not sure yet tho, so no promises, would probably be a while anyways ;)

No problem. I still haven't added Titanium.