Paul Tomlinson
Tony, Hello. Hornby describe the motor as a “3-pole”, so not coreless (see the Tech Specs in the attached link). I assume you’re running with the match truck to aid pickup, and adjusted the wipers to cope with the increase in B2B?
As regards coreless motors, the smallest High Level do is a 1219, but Peter’s Spares have a good selection of smaller ones, if you feel inclined to replace it.
RT Models also do an etched chassis, and High Level do a 4WD drive.
https://uk.hornby.com/products/ruston-hornsby-48ds-0-4-0-200792-gower-princess-era-10-r30013