Good start. Definitely some room for improvement but I had some excellent stages too. 50 minutes is definitely possible, and I think sub-50 will be possible if more tech is found.
Stage rundown:
Stage 1: 7/10 - Time was decent, didn't drop anything major, and I didn't want to reset too much.
Stage 2: 8/10 - Some small mistakes here and there but overall very good.
Stage 3: 2/10 - My worst stage. Everything that could have gone wrong, went wrong.
Stage 4: 4/10? - Without an Estel infinite it's really hard to tell what's a decent Stage 4 anymore. This definitely wasn't a good stage 4, but it wasn't awful I guess.
Stage 5: 7/10 - This can potentially go a lot lower, but stage 5 is so volatile any run like this in the 4:4x range is good.
Stage 6: 11/10 - 5:18 Chinatown, nuff said.
Stage 7: 5/10 - Really badly executed skip. Estel fight was pretty good.
Stage 8: 8/10 or 9/10 time for not really getting double diva, but overall not great because I didn't get double diva. I got 3:4x, 3:0x is possible with double diva.
Stage 9: 9/10. Only minor errors here and there, very clean overall.
Stage 10: 5/10. Boo DJ :( Would have been a great time otherwise.
Stage 11: 10/10 4:07 is really good and I've only beaten that time maybe once or twice.
Stage 12: 9/10 Really good overall especially since no big ben tech or setups have been found. Has a lot of potential to go down once said setups are found.