A few things to note:

1) The name Tank is taken by Alex MacWillaims' HW vapourbot.

2) 25mph is not needed; it will prove too hard to control

3) polycarb is any thickness isn't really strong armour, you might want to switch to something stronger...

4) why do you put strengths and weaknesses? it is not a good idea to put them there in the first place (as I have learned)

5) What powers the front lifter? what's it made of? what's the saw made of?

6) Simply stating a robot to go by the shape is not a good idea, as you have been told countless times. Some people may not have seen King B Powerworks before... :P

Apart from that, it's fine.