The early Legacy models indeed didn't have the same smoke features as the LC+ 2.0. The LC+ 2.0 models do have idle smoke. I suspect he just needs more smoke fluid, my little LC+ 2.0 0-6-0T needed closer to 35-40 drops of fluid to properly smoke from brand new with dry smoke units.
FWIW, I made a version of my Super-Chuffer II specifically for early Legacy steam to enhance the chuffing and add idle smoke. It also gives you rule-17 LED headlight if you want to install that feature.
Hi gunrunnerjohn, I would be interested in your Legacy Super-Chuffer II, but I'll take it offline with you.