I use a Clever Dripper for cold brew, hot bloom (2× 30g/30s for small, 2× 60g40s for large), then fill with cold water and leave 12-24hrs.
1:12-13 ratio, V60 grind.
I’d leave the Clever on a draining board, or a brew stand over a server in case of leaks whilst steeping (I had one).
I tend to prefer coffee brewed cold, over hot, but I don’t care for the waiting.