This flipping the bag thing has gone a little of course. The usual procedure is to place the prepared scales flat in layers in bags, etc. and cover with media, both sides. Then place the bags flat in a warm location UNDISTURBED to incubate for 8 to 10 weeks, checking only for excess moisture the first 24 and 48 hours and to open the bag to adjust moisture if necessary. And, for all practical purposes, that's all the average backyard gardener needs to know or do.
The only other exception (s) would be when doing a full bulb scaling and you have many scales in double layers in a gallon bag or if you have 6 or 8 very large scales in a quart size bag. In both of these cases, you'd have by necessity a great deal more media to cover them properly. And when working with a pretty full bag of media, the moisture tends to become, overtime, more concentrated (but not condensed) in the top half than the bottom half. This is visually evident when using light colored natural sphagnum moss (as shown in Rick's photos above). It turns lighter in color as it dries out. So, when I check these 'heavy' bags with a full load of scales and media occasionally and I see there is a color difference (lighter on the bottom than on top), then I'll flip them. Using the saved chipboard as an assist.
It was by this (exception) method, however, that I have observed and concluded that a tiny bublet didn't really care so much what its orientation was and referred to that when commenting on Calin's single scale he had placed vertically. But for the average person with just a few scales---please follow the rules--do not disturb!
