I'm about to give my first rolls of ADOX/EFKE 820 a go since the end of my stocks of Kodak HIE. I'm shotting 120 format using a 89b filter and exposing at around ISO 3 (incident reading) with +1 and +2 stops bracketing. I'm intending to process in Xtol stock, any suggestions for a starting development time? I'm thinking around the 12 minute mark as I've seen a few suggestions on the net that this is about right. Does anyone have experience of this film in Xtol?