He means prewar marx turnouts not the later plastic ones; those are junk imo, for any brand locos.
They need a few pins added to short rails to narrow some gaps as marx used shoes that floated over them vs rollers that drop and bump up. Not hard at all, slip in, eyeball the gap away, crimp, run.
The point style is unusual; actually moves both point ends (vs one) on a center pivot. They are "raw" boxy undecorated covers(often not even a light), and you have to do your own antiderail triggers on plain track. They work well though. There are a few prototypes if that's as, or more important, than running well. (These also work on fat driver trains, few other do)
You might look for a drawbar/truck option where the wheels float free of the drawbar for better tracking as push is applied to the bar. Also, some tender receivers use a thin slot. These bind early when "jackknifed". When backing this keeps the two shafts at less of a jackknifed angle; it compliments pushing.
