Rapido 033027 HO Scale MLW M420 Diesel British Columbia BCR 646 Wheels/Tires - 1.55" Strong 12mm Keyed Hex Standard

Strong 12mm Keyed Hex Standard (Must use 12mm wheels not compatible with pin)

or a straight edge hobby knife

Spektrum™ SR2100 5

and our tried-and-true ball differential

0 inches (26mm)

Rapido 033027 HO Scale MLW M420 Diesel British Columbia BCR 646 Wheels/Tires - 1.55" Strong 12mm Keyed Hex StandardRapido 033027 HO Scale MLW M420 Diesel British Columbia BCR 646 The M420 was equipped with the ALCO 12V 251c3 prime mover producing 2000 H. P. Most M420 units rode on MLW ZWT (Zero Weight Transfer) trucks. The only exception to this were the 5 units built for the Providence & Worcester, which rode on ALCO trade in FA trucks. The P&W required a different bolster design and a slightly different truck spacing, making them unique. MLW constructed 103