So working on the alignment issue, and this is part one of the project was just to have some spikes that you can shove into the grid (and yes, before all the CNC Milling folks jump on this post, yeah, I get that the grid is not locked down - that’s why this is part one - part two will be locking a structure to the case under compression with these spikes into the grid holding everything in place rigidly).
The major reason was figuring out a nice tight set of spikes to go into the grid, which will eventually be a full 3D thing that goes against the case and locks down the grid and provides a nice repeatable place to put your work in general.
Now the horizontal doesn’t grip as well as the vertical (which is quite solid) since the horizontal grid pattern actually is kind of weird if you look close, this is not a perfect honeycomb and there is a slight offset between rows). The vertical locks in sharply. Need to play some more with that.
Here is an example of how this forms a nice block for your work, and the horizontal one I left out so you can see it