Looking good James.
I use 145C solder for everything, with liquid flux (Carrs Yellow - or homemade 12% phosphoric accid)), the only exception being 70C solder for whitemetal parts (with 145C for pre-tinning any brass or N/S to whitemetal parts will be fixed)
I have used 180C and 240C along with 145C for complex assemblies, where the intent is to avoid previously soldered parts falling off as you add more parts on. I have found the higher temperature 240C solder more difficult to work with (and harder on the soldering iron tips) and of late just use 145c for everything - if you are in and out quick, and don't dwell too long, everything stays together as it should.
My singular soldering challenge to date has been affixing the LMS tender side laminates / overlays on my Brassmasters kits. I have a 75W iron, and use 145C solder, but struggle to get enough heat into the pieces to get the solder really flowing (despite pre-tinning). I can get there, but not without some minor distortion to the over-laminates when viewed against the light.