Dig box recommendations.

Im thinking about setting up a "dig box" in the 4x2x2 habitat on the right side where the hollow log is sitting now (according to the pic below)
Im not sure what to use though. Ive seen a few examples like a simple 18Lx10Wx6H plastic bin with flaxseed to bricks with play sand and top soil.

Im hoping to find some suggestions/recommendations and possibly any visual example of what others have done for dig boxes if possible?

My current thoughts were to use a higher plastic bin and use fauna kraft soil mixed with play sand and then find a ramp of some sort to allow entry to get into the bin and the branch I have now to exit. I dont plan to feed in it so all feeding will be more dubias/worms away from the dig box. I dont know if my dragon is a female or male but I just thought of giving the dragon the texture difference instead of doing 100% tile.

All opinions/suggestions/criticisms welcomed. Im still learning.

I’m thinking of doing similar but with fleece blanket strips as they pose no risk

This is Lazy's dig box. I used a clean paint tray (never used for paint) and filled it with excavator clay. I put his hide over it and his hammock.