• 2 x gunpods with collapsible shoulder stocks and folding pistol grips. These can be stored either in the ventral FAST packs or held in the optional hands. I should also point out that the sculpt of the central section and pistol grip of the gunpod is not that accurate to the official lineart.
• 2 x detachable ventral FAST Packs, which plug onto leg-bay covers and are capable of storing the gunpods.
• 2 x detachable plug-in rear landing gear for use with the ventral FAST packs attached.
• 1 x Guld Goa Bowman Pilot Figure (very small and lacking in detail).
• 2 x detachable optional hands with extended trigger fingers for holding the gun pods.
• 2 x detachable FAST pack fuel tanks, mountable on the tail fins.

• The panel lines have been made thinner than on the original YF-21. This was done as Yamato thought the panel lines on the original YF-21 were too thick.

• The ankle joint has been changed from a ratchet joint to a ball joint. This was done to improve stability and poseability by give the foot a few degrees of side-to-side movement, thus allowing the foot to remain flat on the ground even when the legs are spread. Luckily the ankle joints are very tight, so there is no worry about having loose ankles. In fact, the joints were initially too tight and I was worried about snapping them the first time I had to rotate the feet when transforming from fighter mode to battroid mode.

• The legs now fold flat (sideways) in fighter mode, which is anime and lineart accurate and gives the fighter a more sleeker look when viewed from the side or front.

• The hip joints have also been totally redesigned. I can't see any benefit to this change, unless it is to help the legs to fold sideways in fighter mode.

• The shoulder sliders, which were constructed of ABS plastic on the original YF-21 and were very prone to stress cracking  have now been changed to PVC. So far after multiple transformations and some fairy rough handling by me, they have shown no signs of cracking or stress.

• The head laser on the sample was slightly bent. This is not really a big problem, but was the first time I've encountered this on a YF-21.

• The first couple of times I transformed to fighter mode, everything locked together without problems. However, from the third transformation onwards it became increasingly difficult to get the head section to lock down flat in fighter mode. Every time I tried to lock the head cowling down flat, it would just pop back up again. I  have not been able to determine the cause of this yet.

• The optional hands for holding the gunpods are incredibly difficult to attach to the wrist pegs. It is a real exercise in frustration getting them to attach as the angled rear of the wrist is overly large and the wrist cavity is partially blocked by one of the screws and a locating pin inside the forearm. The trick to attach the hand is to push the hand straight back onto the peg, rather than trying to push it on at an angle. However, even then it is not a sure thing and can take several frustrating minutes to attach the gunpod hands. In the end, I found it far easier to disassemble the outer forearm cover, pop on the hand and then re-attach the outer forearm cover, which is held on by two screws.

• The trigger finger on the gunpod hands is not well designed and when the gunpod is placed in the hand, the trigger finger needs to be forced up at an angle in order to fit it into the trigger guard. I can fore see this causing the trigger finger to snap off after a while.