I should start doing this.

So let me get this straight, you have like your finished song, and then you put a reference track into a layer.

Should it be -3db as well, since this is about the mixdown am I right?

So do like bigger time djs just exchange work? Such as space laces reducing an excision song? Cause that'd make sense haha. A Yes most of the time it is. Check out remixcomps.com there are a lot of competition that have stems. You can always try to bootleg the track you want or you can make an edit.

Using reverb/delay on a Send Channel instead of the channel the plug-in is on.

Start with a simple chord progression (look some up if you have to) then just muck around within the progression. Check the midi files and you're realize most of those melodies are pretty simple This! If youre stuck. Just mess around with your midi keyboard till you find some notes that will fit to...