We have shoved some heavy plastic pipe the size of the grain vac hose in a hole cut in the man door. Started with plenty of pipe to reach the center of a 48’ bin but probably only was able to insert 18’ or so. Running the grain vac connected to this pipe while shoving it in the bin helps a lot. Like mentioned we didn’t reach the center but it was way better than unloading the majority of the bin from one side.