This is what I did... lids zap strapped to the bottom. I turn the traps over and reach up through the main hatch and twist the bait cup on from below, rather than lowering it from the top. Almost zero spilling of stinky prawn bait this way. For trap weights, I went to Crappy Tire and bought neoprene dumbells in the 1-2 lb sizes, and zap strapped those in too. Dirt cheap.