In that case, I'm afraid you've failed to meet your own standard.
The commands given in the books of Ephesians and Colossians were given specifically to the members of the churches in Ephesus and Colosse. Unless you are a member of one of those churches, the command wasn't given specifically to you.
And before you call it a spurious argument, remember the standard to which you agreed: "When a specific command is issued by God to individuals, that those individuals should follow that command explicitly, neither adding nor omitting anything."
By that standard, your presumption to worship according to the commands given the Ephesians and Colossians is no more appropriate than for a Benjamite to offer sacrifice in the place of a Levitical priest.
Plainly something is amiss...but I don't think it's my logic. My point is that, unless God comes to you personally and gives you a specific command, you necessarily have to make some working assumptions about how one relates to God. Your practice with regard to instrumental music is just such an assumption. Reasonable? Sure. Correct? Maybe. Binding on all of Christendom? No.
If that is how you are wanting to circumvent clear teaching of the Word of God, that is your decision. The fact is that the command was given to those congregations. And since God is not the author of confusion (1 Corinthians 14:33), a command to a congregation of the Lord's body by an inspired writer is a command to all members of the Lord's body.