I have only had a Model 1100 walnut youth stock, and the butt on that was the same as an LT20. The butt was "full" sized, the stock just tapered quicker. In looking at pictures of the newer youth stock with spacers, it looks like they went the same way with that one. Can't speak to all the Expesses. The only pre-fit recoil pad that I have ever seen fit properly on a wood stocked Remington was on a laminated Express stock. Everything else was going to be grind to fit to be right.