If More Science installed:

• galvanized-steel require logistic-science-pack
• logistic-science-pack require bottling-research
• bottling-research require purification-research
• purification-research require fluid-handling
• fluid-handling require galvanized-steel

My proposal: just remove logistic-science-pack dependency if mods.MoreScience.
You already use same workaround for krastorio.

Nickel has same problem. My current way to deal with you mods (bz lib used):

if mods.BrassTacks then
    local terrible_tech = "galvanized-steel"
    local victim_tech = "fluid-handling"
    util.remove_prerequisite(victim_tech, terrible_tech)
    util.replace_ingredient("storage-tank", "hardened-hull", "steel-plate")
end

But after that, game is still impassable without bz gaz (or another early game chemical plant mod). Because invar.

Thank you for the reports. I've been hit by several IRL problems in quick succession, which is why I haven't had the time or focus needed for modding. I intend to follow up on all the threads people have posted once things are resolved - I don't know when that will be just yet, but I wanted to post something to clarify that I had not dropped off the face of the earth never to be seen again. Thanks in advance for being patient.

No problems.
As it turned out, More Science has a lot of incompatible with other mods. Looks like I should write my own compatibility addon if I want to play with all of them. Of course, I can also add workaround for your mods there.

(Chemical plant is a weak point. More Science water purification mechanics should be changed, I guess...)