Managed to snag some ascorbic acid this morning... haven't been able to find any locally for months now. But with some in hand now, resumed my project of shooting some old Kodachrome and developing it in caffenol. I just fired off 6 frames to test the solution, and the ascorbic acid sure makes a HUGE difference. Without it, the film was dark and muddy, with very little contrast. Took a lot of editing to even get a decent image. Add the ascorbic acid, and the negatives just pop right off the film base! Pardon the water spots..... this was just a test run.