I don't measure my brass I just send it all thru the trimmer.. only the brass that is longer than the trim length would be trimmed... brass that does not need trimming still goes thru the process but nothing gets trimmed off...How often did you need to trim the LC brass? I'm assuming you only trimmed when it was over trim length spec?
My brass prep process is
de-cap
anneal
clean
resize
trim
clean (wipe of lube)
prime
load