Leader 120 2540 propeller spacers

The [Leader 120](http://bit.ly/2tQ9LZK) is a really popular and great micro FPV quadcopter but the stock propellers are pretty bad, especially when using 3s. Therefore it's popular to upgrade to the [Gemfan 2540](http://bit.ly/2GtnI2G). The only problem is that the screws are too long. If you're using the stock screws with the Gemfan propellers there is a high risk of damaging the motor windings. I created these 1mm spacers in order to make clearance for the screws. I printed them from PLA. The