Like most people, I am not that happy with Sentinel Prime's height, specifically the length of his legs, and always wish his height matches up with Voyager Prime's. So with a night of experimenting, I finally figure out a way to solve that. Giving Sentinel new feet. Took me a while to figure out a good solution as there aren't much flat enough surfaces you can glue parts on to Sentinel's feet area. But eventually found a tight spots from the inside of the leg that has room for a small screw, and found a nice pair of usable feet from my scrap Alternator Roll Bar. So after some measuring, triming, and drilling, Sentinel got a lot taller, and more stability with added articulation on the feet, as well as an additional add-on to his truck mode. As you can see, while Sentinel is still a tad shorter, its good enough for me. At least he no longer need Prime to get into 'midget mode (legs retracted)' just for Sentinel to feel better standing around. And gave Sentinel a nicer proportion overall. Pretty happy with the results.