I had a lot of fun today driving the delta.
Here is a video of the loader in action
http://www.youtube.com/watch?v=s-3_5Qq-SZw
I didn't try it out with sand as I want to keep the delta loader clean as I am planning to sell it because I need to recover my costs so I can start on my next model which will be the excavator.
if anyone has interest in buying it you can let me know by private message.
rgrds
Koen