Here is his article on Christian worship. He deals with some of the objections to Psalm singing and answers them in a very pastoral and humble way. Our position on worship is not a popular one in today's Christian milieu, which makes it all the more important to use care and a pastoral approach to dealing with these differences. If the position is biblical and offensive to some Christians; then the Scriptures should do the offending, not the messenger. I would recommend that you read it before the Lord's Day.