I like using a trickler. Problem was, I couldn't find a trickler I liked! The Redding was the best I found, out of maybe five commercial ones.
Three things "wrong" with them. One, they are too light for the stability needed. Two, the feed tubes are too large and, usually, of aluminum so they really don't turn as smoothly as they should. Three, the knobs are all too small, I perfer a larger knob so I can turn it with a trigger finger tip, no thumb.
Don't know what to tell you to do, I had to make mine but I'm quite happy with it. If you are a tinkerer, you can try using a thin wall brass pipe (go to a plumbing supply store and get a 1 1/2" x 6" sink drain "tail piece") for the body and use a 5" section of 1/4" diameter (from a broken auto radio antenna) chromed, hard brass tubing for the feed tube. Pour maybe three inches of lead into the bottom of the body for weight and epoxy on a 3" disc of plastic or what ever for a base. Then pour any epoxy into the body, over the lead, to make a smooth bottom for the powder. Drill slightly offset holes in the body, just above the epoxy layer, for the feed tube. Put a 1" or so electronics knob, Radio Shack, on the top end of the feed tube and let the lower end extend about 3" to reach the scale pan. Mark the feed tube where it passes through the body and file a powder pick-up hole there.
My tumbler is now about 10 years old and it's NOT for sale! It weights about 2.5 pounds (I made a lead filled base too) and works fine.