Hi, I'm a knife novice too. Here's my ten cents worth; I wouldn't use liners because they will (as has been said) weaken the bond. I would use pins. I wouldn't worry about the pins being a tight fit through the metal tang, because the epoxy will "pool" into any gap. your main problem will be to get the pins slotting neatly into the scales, that's just about having the right sized bit. You don't want any gap, but you don't want too tight a fit because if the wood swells the handle might split around a tight pin.
Rough shape your scales and epoxy one to the handle, flip it tang side up and drill straight holes through the scale through the tang hole.Glue the other scale on and then drill through the hole in the opposite scale to make your pin holes through the second scale. If you've drilled straight you should be in business; glue in the pins and cut to fit with a hacksaw, be careful not to hacksaw into the scales, clamp the handle and when it's set, sand it to shape. The pins will look crap at first but will sand up a treat. At worst you will end up with squint pins and visible glue gaps. If you do, just abuse your knife until it has enough "character" for these imperfections to look like signs of good hard use.
Good luck!
BTW, Nice work Westnorfolk, great wood, very neat work, cool knife!