What are your favourite tools for crevicing and/or scraping material from in between large boulders, cobbles and rocks in tight spaces?

I'm talking about those situations where you're digging a hole to max depth by hand, and you have to reach in 2-3 feet in between large rocks and cobbles to scrape spaces that might only be 1 inch wide, with material jammed inside (e.g. pebbles, small rocks, etc).

Here are the tools I use:

STANDARD TOOLS

Large pry bar

Various small and medium scrapers and prying tools

Medium pickaxe

Small heavy duty scoop

Mini mattock

Cold Chisel

DIY TOOLS (NON-STANDARD)

Extra long DIY crevicing tool that I welded myself (6 ft of 1/2" rebar with a cut off head tyne from a hand cultivator gardening tool welded onto the end as a narrow scraping mechanism.

Medium length DIY crevicing tool - 3ft of 1/2" rebar, same tyne as above welded on.

Bucket shovel: 5 gal bucket cut in half lengthwise (chip material down from a face or into a tiny gully to fill the bucket shovel). The bucket shovel fits well into tight spaces, and is very efficient for digging as material doesn't have to be re-scraped from the bottom of your crevices or holes.

Long-handled weeder (Garant) - also effective for loosening and scraping material. Enables working while standing up instea of bending over sideways and using go-go gadget arm to reach way in between large boulders, rocks, etc.

What are some of your favourite tools for crevicing or working in between large boulders and cobbles, or working with compacted gravels?