OP
CTID
I saw a spark on a job using a half round file, he was really flying through making off a load of ends. Asked him why he used this method and he said the file was more sturdy to use, the angle of the metal construction of the file meant it exposed the armourings to see that all were adequately scored, he found the armouring was cut neater and last but not least he finds it quicker. I tried it and believe me I'm now a convert.