I just ordered some new blades for my old trimmer and also ordered the Tonic. I can't spend $50 on the SU cutter right now. The Tonic was $28 and free shipping on Amazon because I'm a Prime member. It's on sale for $25 at Joann's but with the shipping it would have been the same and I wouldn't have had it in 2 days.
I'm sending the trimmer back. I'll just use the exchange to keep adding to my firm foam pad collection. Of course I'm out shipping both ways, which will probably end up costing half the cost of the trimmer. But I can't have something sitting in my studio staring at me unused. Live and learn. And learn and learn...