Once the power block has been tested in its new form, ( I wire the block using jump lead in the same polarity as standard LGB power blocks, this enables twin pickup from track, or catenary.) Now remove the dummy side plates, and brake shoes, the side plates are held on by two small self tapers each side. Also cut the bogie pivot post down in height. If all is working OK put some super glue on the shortened axle ends, refit the wheels, test again.
Alyn