Lucky wrote: I might not want a corroded spring-loaded ballbearing to be all that stands between hydraulic pressure and no brakes, ten years down the line Given how infrequently the brakes get bled, I'm not sure if adding complexity is worthwhile. After all, as we know if there's a way for something to go wrong the Rotary Gods will find it
doesn't the spring loaded gizmo only come into play when you slacken them off to bleed the brakes.... rest of the time when they're locked down they work just like a standard bleed nipple? or have I misinterpreted it?
No I'm not My point is that you slacken them off to bleed the brakes, then nip it up again... and then leave it for years until you next need to bleed the brakes (or three months in Codge's case, lol)...and find the manky brake fluid you left in the one-way valve part all those years ago has corroded the ball bearing and associated biro spring into a solid fused mess of rust and gunge. And your lovely eeezzeee-bleeder is essentially now a solid plug
don't you service your car as per the manufacturers schedule Nik? Fair point if someone doesn''t change their fluid for 10 years but we're all a bit more conscientious regarding maintenance aren't we?
Lucky wrote: I might not want a corroded spring-loaded ballbearing to be all that stands between hydraulic pressure and no brakes, ten years down the line
That's my point. A clogged bleeder doesn't imply brake failure
On top of that, my comment about these only being worth while if you keep the car still stands - if you sold the car after the first bleed then it makes no sense, if you keep it then I think they would be a worthwhile investment. If you keep it then you are the one in charge or Brahe fluid flush schedules. The next buyer won't know or appreciate the benefit and so who cares if they dont change the fluid? I suspect the calipers would be snot so it would be a full Brake replacement regardless.
Given how infrequently the brakes get bled, I'm not sure if adding complexity is worthwhile. After all, as we know if there's a way for something to go wrong the Rotary Gods will find it
My point is that you slacken them off to bleed the brakes, then nip it up again... and then leave it for years until you next need to bleed the brakes (or three months in Codge's case, lol)...and find the manky brake fluid you left in the one-way valve part all those years ago has corroded the ball bearing and associated biro spring into a solid fused mess of rust and gunge. And your lovely eeezzeee-bleeder is essentially now a solid plug 
