Nice pick up mate, I have volumes 1 & 2...... Twice!
When i drowned my GQ in 2004 I found a set in the Trading Post and was damn lucky to buy them the week i needed them. I think i paid $80 for the set. I dont remember how i came to have the second set, I bought them maybe 12 years ago and may be off face book. Happy to have both sets though. There is a 3rd folder i dont have that has some factory updates in it but i think they are in the digital version we host.
I have a full set in the Shed and a full set in my Office. obviously we have the electronic version on this forum. (Identical copies of what you are holding there mate. I spent a fair bit of time in the back side of Volume 2 today damn it trying to solve some electrical issues with this new loom splice.