Peter,
I support what you said. When I totally rebuilt my 1958 +4 in 1972-74 I replaced the entire brake system, Goodridge stainless lines, Kunnifer tubes and silicone fluid. Other than brake linings and infrequent cylinder repair I have been running silicone to this year. Drain and refill every 10 years. I was living in HK for 30 years so high humidity and reason for silicone.
When I bought my 86 +4 from the factory I asked them to fill system with silicone. They said law did not allow. So, after first service I purged entire system refilling with Silicone and new Aeroquip. Aeroquip or similar get rid of the soft pedal regardless of fluid. If you live in a high humidity area silicone solves the water and corrosion issues.
Moss Motors sell nice bright stickers saying Caution Silicone Fluid and also Caution Positive Earth if required.
Cylinder rubbers look like right out of the box when you change at 10 years.
I only keep the three wheeler(2012) on normal fluid.
Tom S
