RC Plane Launcher

**This 'Thing' is not complete at the time of publishing. Hopefully will be completed soon.**
https://www.youtube.com/watch?v=f0HsWktBPlk

Project:
**RC Plane Launcher**
I find it hard sometimes trying to hold the radio and hand launch a plane at the same time.
I have seen bungee cord launchers that are basic but required a very long bungee cord to work. While searching for more Ideas I saw a launcher that didn't require a long cord but used pulleys to help get the force needed to get the plane in the air. So I took both Ideas and made this up.

Build of Materials:
1 2020 aluminum extrusion 1 meter long.
2 2020 aluminum extrusion 450mm long.
2 2020 aluminum extrusion 90mm long.
2 m8 x 75mm bolts.
2 m8 lock-nuts.
4 m8 6mm spacers.
4 50mm diameter pulleys with 608zz bearings and u grove for 10mm rope: https://www.amazon.com/gp/product/B01HD4QJFK/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1
Shock Cord- 1/8" x 25' (more than enough): https://www.amazon.com/gp/product/B078NF