I really liked my old Sprout 3" , it was light and powerful at the same time. Alas, after flying it for 6 months I discovered the "large" motors were killing the small 650mAh batteries way faster than I'd like to. Guess my current draw estimate was too optimistic.

I rebuilt the quad aiming to fit an 850mAh battery while remaining under 250g; with over 30g weight difference this was no easy task!

A list of things that I wanted to keep:

• motors and ESCs: was not looking to sacrifice any power.
• replaceable arms: got 5 spares and I like the frame a lot, so...
• hellgate buzzer: saved my quads a couple of times.

Among others I swapped the 25mm spacers for 20mm, I cut down the extra 5mm of the FC/ESC M3 screws, and I changed the Micro Swift 3 for a Racer Nano.

The biggest weight savers were without doubt:

• Runcam Racer Nano
• shorter FC M3 screws (M2 would make much more sense!)
• shortened main power leads (I was not using the extra 5cm anyway)
  This alone amounted for almost 20g.

Other weight savings that did not account to much and were almost negligible:

• shorter FC cables (do it to have a clean build, not for the weight savings)
• dipole antenna (in the end I left the polarized antenna on)
• flat lock nuts (hardly a gram difference for all 4...)

Al in all this build turned out a beauty: slender and powerful as before! My only worry are the cables connecting the ESC and the FC, they seem too fragile and exposed... but I will find a way to reinforce them after taking the pretty pictures ;)