vkka

Same problem with F-105. Constant exposure to pool water seems to kill the wristband. I just got a black elastic band from a haberdashery store and experimented with it. My final solution is to cut a segment, seal both ends with superglue (to keep rubber strands fixed to the band structure) and fold over the pins and sew ends (used black dental floss since all I had at the time). Band is 20mm wide which is a tad too wide but works fine for me. It is very comfortable and I am never going back to a stock bands. They were selling the elastic band by the meter so I have enough for a decade or so.

Lua gives you means to build your object system anyway you want. A trivial example to protect a table below:

  local p = { x = 1, y = 2 }
  print( p.x, p.y )
  
  setmetatable( p,
  {
      __newindex = function() assert( false ) end,
      __index = function() assert( false ) end
  } )
  
  print( p.z )    -- you get assertion failure
  p.k = 12        -- you get assertion failure too

... So it has the potential to make a lot of programs much simpler.

More efficient? Yes. Simpler? Not really. A synchronous program would be simpler, everyone who has done enough of these know it.