When you see those mini-figs you really get the sense of the scale of this moc, excellent.

That's huge!

I've never seen an Optimus that big! Impressive.

Thanks for your comments just to let you know I got half way in building it to transform from the waist down and it worked well,but not long after i started working on the front(for the 3rd time) i relized its NOT possible to get it free standing and to turn into a truck as well because it has it be fixed at the waist for it to stand(and the top is very heavy) And for detail i guess i could do more around the waist and legs.

This seems to be a big work, but I would have liked to see it transformed inot a truck(if possible)

WOW! this thing is huge and it looks great! but in 168 hrs. you could probably of added a bit more detail. Anyway, great job!