4 inch scale Tasker "Little Giant" parts/castings/steel boiler

Parts and castings for a 4 inch scale Tasker steam tractor - it's come to us from an engineering company who had planned on building a pair. This one has a quantity of castings including most gear blanks, flywheel machined, hubs, front wheels part assembled, cylinder block and a box of other smaller parts. There's a steel boiler which has allegedly had ultrasonic and hydraulic tests but for which we have no documentation - looks competently put together, it's bushed for a fusible plug, tubes welded in rather than expanded.