What a beautiful job you are doing. Adding the aluminum tubs and the soldering on the front axle.This adds a great addition of craftsmanship to your model. If I can be of any assistance on your soldering, please feel free to ask. I can't afford a Resistance Soldering Unit, but I have the next best thing a Hekko 900 Series. It works great, with the proper prep. of the soldering joints. And a great start you did on your engine
Much continued success with your great topic.