One useful step before the next
A staged plan.
Visible prerequisites.
Keep procurement and documentation tasks with a local build. Completion is reversible and personal; it never certifies fitment,safe work or installation approval.

Exports include build notes and personal completion state. Keep them private. Browser builds export the saved checklist too. Source/parts revisions create fresh task IDs; old completion stays visible as unrecognized history,never a new approval.
The sequence without JavaScript
- Confirm exact model,vehicle context and current manufacturer documents.
- Record measurements and distinguish overall,cutout,clearance and packaged size.
- Resolve required companions,offered contents and qualified installer questions.
- Confirm exact stock,checkout,freight,returns and timing with suppliers.
- Inspect exact delivered items and retain the supplier’s damage process.
- Complete the qualified documentation handoff with unresolved decisions visible.
No supplier lead-time observation guarantees transit or installer availability. No procedural cutting,wiring,fuel or gas instructions are supplied here. Create/manage a local build · Source relationships · Measurement bases