Zedwork

Claim boundaries seem to appear only at the highest z-index block. This means that, while underground, you can't see claims. Could it be changed so that the gold/glowstone apply to all the blocks in a column?

Actually it would be even more helpful to see the claim boundaries as a vertical column that even includes air blocks. If people don't like that, maybe you could modify the behavior based on the number of sticks in the stack you're holding:
* 1 stick: current behavior
* 2 sticks: highlight all solid blocks in the column
* 3+ sticks: all blocks in the column, including air blocks

I can definitely see why this would be useful, however I believe I have seen similar request shot down by the developer due to the high server resource cost of doing that. I'll try to find that, or make a new request (the plugin is being maintained by a different developer now)