I'm not sure if anybody's gonna like this but here it is anyway. I got brave ( and drunk ) and ripped apart a Leader Jetfire this morning and this is what I've come up with. Needless to say I was really disappointed with Hasbro's Power Up Optimus/Jetfire mode, so I came up with this this morning. I DO have a more "Heavy Moded", non-transforming version in the works but I wanted to come up with something anybody could do provided they have both the figures needed. You will only have to remove 3 screws from each of Optimus's feet, pull each half apart, remove the pin, then reassemble, then, well, from the pics you should be able to figure it out. The Jetfire cockpit and jet parts are basically just resting atop the appropriate Optimus parts, ( figure it out from the pics, it's EASY ). You WILL have to completely disassemble your Leader Jetfire figure BUT, if it's any consolation, his "jet" parts can be reassembled into a pretty descent SR-71 model when not used on Optimus ( thanks Hasbro !! ). The Hasbro combo gives him a head height of 11 1/2 inches, this mod gives him a head height of 12 1/2 inches. Feel free to comment, positive OR negative.