I was in Semboro about the same time and it was an interesting operation. As well as the 29, they had some fireless cookers and mallets. Took a cab ride out into the fields on an 0-4-4-0 and along the way the 4 wheel tender derailed. Javanese ingenuity was put to the test. A bale of bagasse ( crushed sugar cane used as fuel ), was employed as a fulcrum and a log as a lever. The lift looked good until the front of the tender got stuck on the loco's footplate, leaving a wheelset well above rail height. Oops. No amount of fussing, heaving and swearing got the job done. Thinking they would need to get a crew to help and seeing that the sun was headed down, I made a run for a nearby road and flagged down a bus to get me back to the mill and my car. Man, those guys were going to be out there some time........ wrong. As the bus pulled out, I saw the loco merrily heading back with the errant tender still at a jaunty angle and one wheelset still 6" above the rail. Casual railroading.