Back when it came out I bought the SWTF Saesee Tiin because I just love the Delta-7 Aethersprite (as long as it includes the hyperspace ring), plus I'm of the opinion that Saesee Tiin/Delta-7 is one of the few even halfway worthwhile SWTF toys. Anyway! I removed the head back when I bought it, because I always intended to replace it with a better, more Cybertronian-looking noggin. Never got around to choosing a head. And now, we have Titans Return.... and DUDE! The Titanmasters are perfect for this toy (and probably several other SWTFs too). There's even a cockpit that can fit the Titanmaster as the pilot in vehicle mode. It's a tight fit, but with a minimum of modding it can work perfectly. Same for the neck hole for mounting the Titanmaster in head mode. The hole's even square! Just a tiny bit big. Working on adjusting that, but for now, dig the pics.