Hack an office chair into a "Hill Billy High Chair"

This chair is for those people who made an awesome high desk but realize they would like to take a seat every once in a while and still be at reasonable elevation to do work.  This project began when a friend brought home a used computer chair (nothing special; have one similar that i bought for $60 from amazon) and it was sitting too long for me not to hack it....I really wanted a chair that was tall enough for me to sit at my standing desk when I so choose, but  the only viable option I could find were bar stool style chairs which are not cheap. Thus, I started looking for repurposable items and the idea hit me: Disconnect the computer chair from its base and add a  frame which meets the necessary height adjustment but maintains stability and balance. What I came up with was a basic 2x4 box frame that does not especially streamline the chair's stature, but does the job non the less. With this, I introduce to you what I like to call the Hill Billy High Chair, mainly for poetic effect.


Tools Used:
Tape Measure/Square
Level
Circular Saw
Jig Saw
Cordless Drill/ Drill Bits
Palm Sander
File
Allen Wrench

Materials Used:
(3) 8 foot 2x4s
Leftover piece of OSB
(4) 0.25 inch 20 thread nuts and washers
(2) cans of black spray paint
Several 2.5 inch c
1.25 inch coarse thread wood screws

Step 1: Step 1. Disassemble Office Chair

You'll need an allen wrench for this step. Remove the 4 hex bolts. Keep all the parts.