some more improvements

see readme_geojak for changelist compared to the main aux branch

aux-addon/tabs/post/core.lua

@@ -431,19 +431,23 @@ function update_item(item)
     UIDropDownMenu_SetSelectedValue(duration_dropdown, settings.duration)
 
     hide_checkbox:SetChecked(settings.hidden)
-
+	local ii = 1
     if selected_item.max_charges then
 	    for i = selected_item.max_charges, 1, -1 do
 			if selected_item.availability[i] > 0 then
 				stack_size_slider:SetMinMaxValues(1, i)
+				ii=i
 				break
 			end
 	    end
     else
+		ii = min(selected_item.max_stack, selected_item.aux_quantity)
 	    stack_size_slider:SetMinMaxValues(1, min(selected_item.max_stack, selected_item.aux_quantity))
     end
+	
+	stack_size_slider:SetValue(math.random(1,ii))
     --stack_size_slider:SetValue(aux.huge)
-	stack_size_slider:SetValue(1)
+	--stack_size_slider:SetValue(1)
     quantity_update(true)
 
     unit_start_price_input:SetText(money.to_string(settings.start_price, true, nil, nil, true))