Nearly there! Nice to see you again Wodonga :D
And so two things were needed. More space so lets get rid of the computer?
But where to?
The tray under the desk top was taken out to make room for the armrests on chair. The tray hung too low.
So I cut the sides of the slide down and lifted the tray about 2 inches. This left just enough room for the lap top, and more room for my knees underneath, whilst sitting at the correct height. Good job done here.
Took a little more than an hour to build and install and like I thought at Bunnings, it was exactly the right size for this space.
In addition it stored most of my unfinished projects.