I have had a wall chaser for years and it's the best thing you will ever use, you can mince about all day with a hammer and bolster, or get white finger by bouncing around on the back of a sds / kango all you want, but the shaser will make a neater chase in a fraction of the time which is infinatly easier to plaster over and make it dissapear. I have used both methods and it's the chaser EVERY time. infact if it wasn't connected to a tidy vac, just a bog standard one, the time you save on making the chase can be used to clean up after yourself.