You should close up the back, though I do get why it’s open, and the fact that it can hold minfigs is quite cool. Also, build him a trailer inwhich to hold Roller. The MOC looks pretty great overall, and don’t worry, my MOCs have much worse photo quality. For exaple:
Wow. I have nothing to say but wow.
This is a really good looking Prime. I have plans to make Soundwave, so is there any way I can be more like… you?
Sorry i responded late. Usally when I’m building a transformer I’ll search the transformer in lego to see what other people have done and how they do it. This helps me, but also gives me a bit of builder’s block as i don’t want to copy anyone. I usally build G1 transformers because there alot simpler overall. It also would be cool if you made it so he could store cassettes in his chest.
Hope this was helpful, and good luck
@Omega_Tahu It did thank you. I haven’t even thought of the cassette part! And I’ll be sure to look at other TF mocs for inspiration (not to steal. lol)
Uhh, for the MOC, can I ask how you’re connecting the legs? And just the top part of the arm?
@Omega_Tahu I’m not sure if you’ll see this, but is that sturdy enough to hold?
Edited for Double Post - Waj
Please refrain from posting on a topic twice in a row. If you want to reply to multiple people, just type the ‘@’ symbol in front of the user’s name that you want to reply to. Also, read this. Thank you 
all joints are connected with full size ball joints, except the ankle, which are mixel ball joints, the wrists, which are clip hinges, and neck, which is one stud pivot.
Golly, this is just like the toy. Ah, the nostalgia
Aww man. I wanted to make that joke.
