I explored so-called "stand" development a few years ago and found it a deeply flawed and unpredictable process at best: bromide drag ruined more film than not. I quickly abandoned it for use on roll film (35mm and 120) as it always left a hot band of density at the bottom edge of the roll. Horrible. It can work OK with sheet film, but still it tends to deliver areas of uneven density. I've come to the conclusion that its more myth than an actual useful tool. As much as some would have you believe it can work miracles, I found it introduced more problems than it fixed.