I never rehydrate Bry-97. The only other things I do is add nutrient and pitch while the fermenter is filling to create turbulence to mix the yeast in. ...but many fill the fermenter and sprinkle on top.
That is part of your secret sauce for shortening lag time with BRY-97. You are rehydrating and dispersing the cells at the same time. A lot of brewers do not realize how important it is to thoroughly mix the culture into their wort, especially with slow starters like BRY-97. I used 6.5-gallon acid carboys for the most of my ten-year-plus first past through this hobby. I purchased my first one shortly after they appeared in the homebrew trade. Back then, 6.5-gallon acid carboys were repurposed from industrial use. They usually showed up at homebrew shops with a small amount of lime inside because they originally held hydrochloric acid. What was nice about these acid carboys is that they came with screw-on caps, which are next to impossible to find today. Anyway, I used to pitch my starter, screw the cap on, turn the acid carboy on its side, and roll it back and forth briskly. That technique shaved many hours off of the lag times I was previously experiencing.
lol incredible anecdotes my man.
when i first arrived in korea in 2010, homebrewing was literally unknown outside of seoul and even there maybe there was one craft beer bar.
i would constantly keep my eye out for anything i could use for homebrewing. there was a single online shop, but it was incredibly overpriced and beyond basic. just DME, 2 or 3 crystals, roasted and pale/pilsner if i remember correctly.
i ended up using this and glass ones like it, which are intended to store distilled alcohol and fruit to make liqueurs. they were kinda nice to have a neck you could reach into, but i ended up using this plastic bag/tube as an airlock system because i couldnt get airlocks or something. i brought over some things like bottlecappers and stuff.
incredibly basic setup in a land of beer hell. it got better and better and easier to brew over time. i set up a homebrew club in my city, but when we actually met in person, everyone liked the idea of "hurr making my own beer!!" but not actually listening to instructions or spending a few hours making it.