>>2978464Hey, I see nobody had taken a stab at this yet. I hope you're still lurking. I'll post this in the film general thread as well.
I compared the dev times for the two developers and found there was a film listed in common with both developers at a similar time. Makes sense to me.
Ilfotec LC29 1+19 develops Rollei Retro 400S in 12 minutes, and also does Washi - S 50 in 12 minutes.
Ilfosol 3 1+14 develops Rollei Retro 400S in 15 minutes. I would say...Try 15 minutes.