I'm not a fan of forcing either. My Ocellaris (8 years old) will host in BTA, and Frogspawn... and just about anything they want to lay claim to. I didn't introduce them to an anemone for the first few years, and they took to a BTA while temporarily in my sell system during a system upgrade.
Sometimes they do, sometimes they don't. Sometimes it's fairly "instant" - sometimes it's not.
BTW, if you try to corral it with eggcrate, the anemone may squeeze through the eggcrate - I've seen that happen. Years ago in an LFS we waited 3 hours for the BTA we wanted to buy, to finish squeezing through the eggcrate that was being used as a tank divider.
Jenn