One of the 2007-built VLs is on broad gauge...I'm not sure about the wagons, but I imagine bogie exchanging new-build standard and broad gauge container and grain wagons has occurred. Those same container wagons could probably also be used in Queensland if bogies were acquired, but the grain wagons couldn't if they haven't been designed to suit QR's kinematic envelope. The conversion of the PN wagons to narrow gauge has been ongoing since October last year, and so far only seven have been completed - so its not necessarily quick and easy to convert wagons for use in Queensland if an opportunity suddenly appears.However, for the best part of the last decade, CFCLA has been buying new build equipment, so acquiring "Queensland ready" rollingstock would not have been difficult...it just appears it hasn't been on the lease company's radar.
Has this new build equipment been BG or SG?The Aurizon grain and cattle fleets regularly transit between the more restricted South West network and QR's other mainlines, plus the Aurizon network. The South Western and Western mainlines and branches are mostly restricted to 15.75-tonne axle loads (16-tonnes to the western mines and 10.75-tonnes between Charleville and Quilpie). This means all of Aurizon's and PN's 20-tonne axle load rollingstock and locomotives can't be used west of Brisbane. Aurizon's 2800 class are also out of gauge as well as too heavy to venture west of Progress Rail's Redbank Workshop.
What are the particular restrictions on loading gauge - is it just the Toowoomba tunnels?
The Toowoomba Range tunnels are the major impediment west of Brisbane, but some bridges may cause problems for maxi-cube containers. The restricted axle loads still in place don't help either.