This is AWESOME! i like the way the kraata fits into the sled, i wouldn't have worked that out. I can't work out how to build the wheelchair, but this is still (in my opinion) the best you've done.
I think that it's really great. I also tried to build some of them. Do you think you can send me a bit of a more detailed picture of the kraata powered engine and the wheel chair?
Overall it was excellent. Come see my site as it has lots of bionicle!!