How are other players getting settlement building supplies to their secondary settlements?

I'm finding it a major UI and shuttle hassle. No spoilers - so I built up settlement at X, where game leads you to. This is currently 'main' settlement for me. Building stuff here is super easy - all componets needed are broken down into raw form automatically.

And that is the problem - the majority of stored supplies at my main settlement is in form of whole parts, like wrenches which when i need it are auyo broken down for gears.

But when I need to build say a few turrets at scondary settlement, i cant just view what raw parts are needed, xfer thise raw parts to my char inventory and fast travel to secondary settlement and just build.

The vast majority pf my building supplies for the stuff that counts - gears, oils, circuits, etc - are not in raw form, but in whole parts form - wrenches, paints, etc. some items i know offhand like wrenches equal steel and gears. But steel and wood is easy, have tons of tht in raw form.

I am ending up having to painfully scroll one item at a time to see what it breaks down to in my main settlement inventory screen, then xfer those items so i can bo to my secondary settlement and build the turrets, etc I need.

By endgame i suppose will have memorized lots of whole parts = raw items breakdown formulas. But for now it is huge hassle. How is everybody else handling getting supplies ferried over to secondary settlement?