Automatic grouting tool - GIF

[suther51]

About 10 years ago I worked on a job where a mason used a Similar tool that hooked to a cordless drill. I asked him about it. He told me that it was expensive but well worth the money in the time savings but HAD to be meticulously cleaned each and every time. He loaned his first one out and it was ruined from lack of proper cleaning. From my observing him using it, it did seem to work very well.