https://www.greatplainselectronics.com/products.asp?cat=30

Great Plains Electronics is an excellent place to start for starter kits. Agree with above trifurcon are good. I didn’t spend a ton on molex brand, amazon has decent crimpers too, and pindude is great! Buy extra and practice, its not difficult once you figure it out. Your games will thank you.

And 0.156 are the larger types (mainly on the powerboard) and the 0.1 are the smaller ones (some on powerboard). From my experience the 0.156 are the ones most likely in need of replacement, but having a few 0.1 on hand is helpful.

Yeah the GI take the 0.156 on my WMS machines. If you get the ~$20 version of crimpers, there are some good videos on youtube, but they need 2 crimps for each connection, one on the insulation and one on the bare wire strands, so the process requires two different positions on the crimping tool, but the waldon brand works well.