Added "Vent" block. Note: Due to the way keen handles the air particle direction, this block has a different default orientation to all the other blocks.

Added more mount points to the adaptor block to match the default conveyor tube mount points. Just in case.

Cleaned up the categories as I noticed I had accidentally added conveyor blocks to non conveyor categories.

Added versions of the blocks without the pipes underneath. Including a block which is just the very top panel.

Added adaptor block for pipe style conveyor to regular style conveyors.

Added "Slope" block.
Fixed leak with vent block. Mount points were wrong so the platform part wasn't sealing.
Tweaked mount points on all other blocks.