Video's IV
I first build a foam model to check the construction on stability and travel. It can be seen on this video

The wooden scale model tests went well, also interfaced to FS2004 and X-plane show good performance. See video here.

Initial tests of single actuator:

Initial tests with complete platform at 150kg payload :

Transition from Platform 3 to Platform 4:

Fully working platform: check out this Initial Test Video