Dan,

doing ANYTHING on a G-70 is a breeze
you really don't need the manual
you just hit the button "MAKEUP TOOLS" and the rest is self explanatory
you could do all you ask (change sounds,volume levels, effects , transposition etc) and much more
NO NEED for a sequencer, this is all part of makeuptools,
you can make your own styles from midifiles, super easy too

you could even edit every part of any drumkit, you can EQ any part of the Kit, you can apply FX to any part of kit,
so if you want the Kick DRY, you got it, if you want the Snare "wet" you got it", if you need the Kick with more bass you got it,

try all that on a Ketron, add reverb to drum track, and sadly ALL drums have reverb

it is SUPER EASY on the G-70, so easy, a caveman can do it