So you consider this whole thread to be illegal and immoral. Deleting one booster is also modifying that system. Changing the brake calipers is too. Is using different (non OEM) pads too?
If modifying an unreliable dual cct system is immoral, isn't driving an older single cct system also? After all you should "know" it's not as safe as a "better" one. How far do you want to carry this? Perhaps we should scrap all these "old, unsafe" cars. That's certainly the position Ralph Nader took on the Corvair. Your position has no legal basis (several modified hot rods have been in crashes without exceptional consequences), certainly no engineering basis, no liability basis (as reflected in the available insurance rates). It's very emotional, and smacks of irrational thinking. Did something happen to lead you to this?
I take the exact opposite view. I know old cars are not as good as new ones, so I drive a recent BMW, Toyota Camry, or GMC truck for all my significant driving needs. I drive my Alfas as a reprieve, to experience a bit of the simpler times I grew up in. I do not drive them aggressively except on the tracks, and even there I don't drive 11/10ths like I did as a young racer. A thousand miles a year is more than I get.
As as career systems engineer, I approached this thread analytically. The simpler system is easier to maintain at full capability. They are still 40 years old, and use 40 year old parts! I've had later Alfas with dual cct systems, and have experienced all the troubles in bleeding and maintaining them that others on the BB have from the day they were new! I've NEVER had any trouble with single cct brakes (I didn't even have a single booster in my racers 'tho the CAS recommended it).
Jim, I deeply respect the engineering expertise you offer to the BB. It's always well reasoned and deep in real world experience, way beyond my own. But You seem to be very emotional about Alfa brakes in several threads. I hope you didn't have a loved one injured over something.
Whatever the reasons, I apologize for rubbing on a sore spot; please forgive me. I just have this (bad) habit of challenging unsupported or unexpected notions. It's something my dad taught me as a tool to better understand technical issues as well as the personal positions of others around me. I'll sometimes take a position I don't even agree with for these reasons. It's helped me to some soaring accomplishments, but has left a few angry people who I would prefer to call friends; you are certainly one of those (people I'd prefer to call friends)!
Robert