The power lead tabs didn't make the transition to a new heater, so I've bought some 0.6mm thick 99.9% Copper Sheet Roll Copper Strip. Should be fun trying to make new power leads.
Another worry is once I get her heated up/under pressure the front boiler plate will leak at the seams. Back in the day they must of ran the engine out of water really early because there was a glob of solder at the bottom/inside the base (can see gabs between tank and front plate). Then my guess they then put the little engine in a box and its been in storage forever - thus the reason it looks so nice cosmetically. Assuming it leaks, it will be a shame as getting seams resealed in the past has never ended up very nice (cosmetically speaking).