I rode unlocked on a few sets of boots (all raichle, deeluxe) for 10+ years. I loved it. Went back to try locked every so often and did not like it. Then I put on bts for a while, didn't make a big difference to me in riding but it did strengthen the boot setup.
I am on now on upz with softer black tongues and the dgss setup which I love. Lots of smooth flex. I run higher angles which gives me great fore and after mobility but plenty firm laterally.
I have a spare bts I can mail you. Try it out, see if you like it, send it back when you're done. PM me if you're interested