I use the LEE trimmer, $13, and a Dewalt drill, which every house should have.
I always trim after sizing. I use the Wilson case gauge to check my work
I did 168 with that trimmer.... It felt like a thousand!!!! I'm searching for a powered trimmer now. I'll leave that Lee system for my 300 Weatherby where I only do 20 at a time.
The Trim-It sounds good, I don't mind deburring and chamfering on my Case prep center, but trimming was for the birds.