In the early priming/sanding phase of my Top Flite Corsair. I am using a 450r as well and am hoping to keep the empty weight around 30 lbs. That may be wishful thinking. I'm waiting on my Keleo exhaust ring. I need to mount the muffler before I can build any battery trays up front. I'm also ordering a CH Ignition system, so I can add that weight up front. Using 32 oz. fuel tank. Hoping to run a 24x8 Falcon prop.