Reflex, that's a sweet set up.
Make sure you get the LARGE Watersob beads (polymers). The smalls one are so small they will come out of the smallest holes of any container (screen) you can make. Some peolple use panty hose which works for them. I picked up some humidifier sticks from Jr's and out the watersorb in them. 50/50 solution of distilled water and propylene Glycol gives me 65 degree RH. After the initial 50/50 i just use distilled water.[