Some parts are easier to understand then others… Tom, i think its meant to be "solving your own design is less complicated then solving a problem the designer, who has no clue what the operator has to endure, created "
In some cases, as per your own design, efforts, sweat and tears included, simplicity prevails…
Thinking in functionality is one keyword i try to implement…
In case of your cover: many designs try to include multi-functionality… try to forget about that…
You want 2 functions, filling lid and puffing lid…
Solution:
1: make one lid that can be closed tight, the easy way, no springs…
2: on that lid, or another place, make an overpressure valve that never will be opened unless you have a “puff”
On stationary designs they use aluminium foil rupture disks, but i am sure a larger tennis ball will work to
A larger , heavy rubber ball, 4" size, on top of a 4" pipe as a blow off valve maybe ?
I could think about hundred different idea’s, some will work for me, some will not work for you…
I learn from any builders experiences, oh my Budha, thank you for the DOW forum and its members…
i think this one fits all… Hands on mentality… sometimes i forgot the gloves and burned my fingers, sometimes i wear flipflops and do plasma cutting…
On DOW i learn from my mistakes and others successes… and vice versa… but mostly i learn from the positive critics i receive…
Damn, writing this i can’t stop dreaming of paying a visit ( study trip ) to each build talked about here on DOW… wow what a trip that would be…