Mineways 13.00 is out. You can now easily make individual block types invisible, as you wish. You can import and export modern .schem files. Golem statue geometry has been added. Plus, many other small fixes.
Amusingly, if you export the built-in [Block Test World] to .schem and put it in a world with WorldEdit or similar, parts of the test area get set on fire by the lava markers: