Large ring rotors with central tunnel

IMPORTANT NOTE: Before subscribing to this mod be sure to check out DX11-ready Two-ended Motors, ShaoCorp Rotors and Rotor Variety first, as those offer similar functionality while being smaller and not having as many issues.

DESCRIPTION: These very large rotors with a walkable 1x1 and 3x3 tunnel in the middle are primarily intended for ships and stations with rotating modules. Both 3x3 tunnel and compact versions also have 4 conveyor doors (2 on opposite ends of the stator + 2 on the sides of the ring) to facilitate cargo transfer among both fixed ends of the rotor and the ring itself.

Known issues:[list] [*] Clicking "Detach" button in the Control Panel will break the rotor permanently with no way to re-attach the ring in-game, [*] It is possible to clip into rotor from outside in a couple of places, due to physics engine limitations, [*] The tunnel isn't airtight, again due to engine limitations. To pressurise the tunnel, surround the rotor with force fields, [*] Sometimes a ring will spawn off-centre. Placing any block on a ring appears to fix this, [*] Blocks cannot be built directly inside a tunnel (and due to the same reason, any attempt to use merge blocks in the tunnel will fail). The workaround is to build those blocks as a separate ship and then anchor them to the main vessel via landing gear, [*] The 3x3 tunnel rotors placed prior to 8 nov 2014 might break and need to be replaced, [*] The compact rotor doesn't have construction stages yet. [/list]

Edit 26 oct 2014: Added even bigger rotor with 3x3 tunnel.

Edit 4 nov 2014: (Very crude) Construction stages added.

Edit 8 nov 2014: After examining some pre-made models decided to retract my previous statement about cargo transfer being impossible and converted 3x3 tunnel version into an advanced ring rotor. The 1x1 tunnel version will remain a regular one for balance and realism reasons. Also increased maximum torque of both rotors to 300 MN*m (use at your own risk) and cleaned some misaligned textures.

Edit 2 mar 2015: Shamelessly stole SquallTemnov's concept. Also added separate G-menu category.

Edit 30 may 2015: Fixed "black box" issue in DX11 mode.

Special thanks to: [list] [*] Harag for his modding tools, [*] Keen Software House, for providing a convenient square of just the right size in the middle of the rotor model. [/list]