Hi Jim --

While my trackwork is probably a bit stricter than NASG / NMRA standards, it 
was the Big Boy that was way off.   The drivers weren't too bad, but the 
tender and loco trucks were at least 1/32 to 3/64 narrow, and I think one 
pair was 1/16" narrow.   From what I understand, both it and the 4-6-6-4 had 
driveline problems associated with poor gearboxes.

Have fun!
Bill Winans

... Sunset was contacted and chose not to change.
...My personal experience is that locomotives made to the older NMRA 
standards, like the Sunset Big Boy, will bump through newer trunouts and may 
or may not opereate reliably. Of course adjusting back to back measurements 
on steam locomotive drivers to 0.800" is not for the faint-of-heart!

Jim Kindraka


 



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