New connections are potential points of failure, but why do you assume they are 'a less than perfect connection'? ALL the connections in the whole thing are potentially less than perfect. Tell us what you would impress you. A modern fuse box conversion would inherently involve new extra connections that are potential failure points, dependent on the operator's skill. I have a new unit with 31 fly leads fitted with bullet sockets, but with my medium solder skills fitting new bullets in a confined space is not attractive, and would add those 31 potential failure points. Just fitting relays to the headlights adds 4 new potential failure points, but nobody brings that up as an objection to doing relays. I have had one headlight failure since doing relays, and that was partly due to panel beaters getting into that area after its misadventure on a flatbed. So far I have had one failure with my home made conversion to blade fuses (4 heavy drain fuses), and that was easily fixed by replacing an old glass fuse in the socket.