I have a box which I cracked open yesterday with the aim of making a series at beach dunes close to me. I initially exposed a test shot at ISO 6 with a 72 filter. I have trawled the net for dev times but nothing is clear with SP445 tank dev. I'm guessing at around 12 mins at 20, but agitation appears to be guesswork at this stage. If anyone has some tips for this film which on first use seems tricky to load (one sheet buckled when I put the dark slide back in), I'd be grateful, thanks.