I re-pinned all the .156 backbox connectors for both Skateball and Mata Hari (except for the display connectors - I'll get to those in the next couple of weeks). I used my Sargent 3136-CT crimping tool which, although expensive, works so well it actually makes the job enjoyable. I had so much fun that I wound up ordering the 3133-CT (.062) and the 3135-CT (.100) crimpers to complete the rest of the work. I've got other crimpers, but the Sargent tools do such a nice, professional job it really is amazing.
I also dug out my soldering supplies and thanks to TerryB's Soldering Guide https://pinside.com/pinball/forum/topic/terrybs-soldering-guide-part-1 I worked on improving my (limited) soldering skills. Practice makes perfect...