Grab Tinkagear as you explore. It won't be the bottleneck in your crafting, but having a stash ready saves backtracking later.

A special gear used in advanced construction

Raw Material
Iron IngotEngineerEngineerTinkagear1 → 3

You can craft Elevator Platform, Lift Platform using Tinkagear. These 2 recipes are mostly Utility items that help fill out your island.

2 recipes
Elevator PlatformUtility
Glassx8›Concretex8›Tinkagearx2
Lift PlatformUtility
Iron Ingotx5›Concretex5›Tinkagearx1