finished and flew this before xmas.... The RCX motors seemed to be decent for 3inch and potentially good for 4in props. I wanted to build a 130 sized frame. My pal has a Japolera frame and this sparrow was similar but more affordable. The ESC was available QUICKLY for a decent price, altho it has vbat out on the connector which fried my vtx03 bc i didnt fully think that connection through when i had it all set up... :/ fortunately that didnt fry my FC!! :D I might have liked a number of other esc's but i from banga'ru but i didnt want to wait another 2-3 weeks , the US location didnt have any 20x20... *144g without battery. *Flies really well, has plenty of punch. I was able to pullout of reverse powerloop! Might try some additional props soon. 2nd day out, broke an arm right at the end near the motor. :/ was able to poot around a lil still after 'straitening' out the damage, but then my new commander googles decided to quit on me (not the batteries). lame carbon on this frame is weak. right under 250g for all those lookin into a sub 250g build* I do NOT recomend this frame bc its weak and breaks