unfortunately for the G4 you pretty much need the entire kit.
1. Primary puller bolt
2. Secondary press (replace bolts in helix after with hex heads)
3. Primary ramp pin puller
4. primary spring cup adapter and press with threaded bolt. The secondary spring cup is now curved so its difficult to separate without the proper tool.
Primary puller and holder.
12pt socket
Pin tool but a metric socket head bolt works.
Primary Spring compressor assembly
Secondary spring compressor
Upper gear holder for the chain case. You can use an socket extension
To do it “by the book” this is what you potentially need.