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How do you go about degassing it? Are you just talking about pulling a quick vacuum in a high quality syringe, or do you have some other apparatus and do it for longer? I have heard surprising claims about the amount of dissolved air contained in mineral oil (not sure if this would apply to DOT fluid too) and have always wondered how long it would take to fully purge it. If you think about opening a carbonated soda/water bottle, once the pressure is lowered, the Co2 starts to be released, but it takes quite a while (hours and hours)...

Glycol ether (primary component of dot 4 and 5.1 brake fluid) contains approximately 19% dissolved atmosphere at STP. Most liquids contain some percentage of dissolved atm with alcohols typically containing more. Short of sparging with helium, vacuum degassing is the most effective method of dissolved gas removal. The soda bottle is somewhat different because it is supersaturated with co2 as a method of generating fizzy bubbles. Yes as the pressure is released the gas content decreases but once it’s done or reached is pressure equilibrium there is still 10 percent dissolved atmosphere in the liquid (approx, just guessing on this)...

Are you saying that the flexed piston seals, which would normally roll back the pistons when the lever is released after a short pull, will slowly creep back along the piston under a long sustained pull as is done by strapping the lever down for an extended period? So it is kind of like advancing the pistons by squeezing the lever with a thinner bleed block or rotor removed, to reduce the lever throw? I've always heard the claim that strapping the lever is to somehow help rid the system of bubbles, although I don't understand how it would actually...

Another thing i am curious aboust is how ling should a brake last? 1 season, 5 seasons, forever? I got me thinking because i crashed and needed to replace the lever body, and bought a complete brake, and man its was a massive improvement! 3 years old MT7 that was upgraded.