Is there a way cruise or speed control can be added to a LionChief steam engine? Can either an ERR module or the electronics from LionChief be swapped with LionChief Plus electronics which has speed control? There's no option of purchasing a LC+ version of the engine I want to covert since it's the Lionel Hallmark Toymaker Santa Express, a rtr starter set engine that's not available in LC+. I also don't want to gut all the electronics since I want to keep the original voice announcements of the Toymaker Santa Express. Also don't envision replacing the puffer style smoke unit with a fan driven one since as seen in the HTSE video link below, the smoke rings produced by the loco using Mega Steam add the perfect whimsy to this fantasy engine.
https://www.youtube.com/watch?v=iDtVS-xZidA