Update 3: Reduced filesize of the items by half, from 250 kb per item when embedded to 110 or so. They were unnecessarily large before.
Update 2 (full release):
Refined the geometry slightly and then added a bunch of new curved variants.
Except for the FlatToFlat2Long2high block, which connects seamlessly to the Vanilla Slope Start and Slope End blocks, everything else connects to the WTMT versions of those blocks.
If you use a different set the shape might not line up perfectly.
I only kept Dirt and Tech for surfaces. Rest seemed unnecessary
Enjoy