Just a little note to those who have leader prime:

WHen you're removing the red chest pieces (for robot to truck conversion), I think its best not to pull the chest pieces outwards by force.

Instead, push the two pieces medially (i.e. towards the centre of the chest) & then slide it outwards towards you.

If you pull it out without sliding it first, I foresee that the little red hook might break if its done too often & the whole figure would be stuffed up since its the an important piece.