Robot from book Computer Controlled Robots for C64, VIC20, Spectrum and BBC

This robot is from the book "Computer Controlled Robots for C64, VIC20, Spectrum and BBC", which can be downloaded, along with other books of a similar vintage, from the publisher's website: https://usborne.com/browse-books/features/computer-and-coding-books/

I used to borrow the book from the library as a child, but never actually got to build the robot from the book. Recently, after finding the book online for free, I decided to finally build the robot for myself.

The video I've attached is from a few weeks ago, as you can see from the photos i've attached, I now have it on wheels, but am yet to actually get it moving.

To finish it, I need to attach some limit switches to the arm and the gripper, as well as finish wiring everything up, find a way to power it, and program the arduino that I have to control it.

Control will be either by a hand held controller, or via computer serial control. I'm unsure which way to go yet.

When it comes to the construction of the robot, I primarily used MDF, while the book says to use Balsa wood. If I was going to rebuild this robot, I'd definately go down the balsa route. I had a few issues with using MDF, and balsa could have been cut with a sharp x-acto knife.