I considered the front sprocket feed for mine but decided against it when I saw how much crud it accrued under the gearbox sprocket cover, however, each to his own...
Which ever way you fit it, at least you have the benefit of constant lubrication for the chain & sprockets which has to be good - I was a little upset when I had to adjust my chain a few days ago......I'd only done it 2300 miles earlier....!
Cheers
Andy