Hello, fellow chastity enthusiasts!

After many years of foolishly using a bulky CB series device, I am looking to upgrade to something much smaller and (hopefully) practical. Aside from having a small flaccid member, I am eager to pursue this since the main thing that's kept me from longterm wear is not wanting my cage to be noticeable under work clothes (and it looks like I'll be "back to the office" in September).

I have heard good things about the HolyTrainer Nano.

Can anyone provide feedback on this? Things to know or watch out for?

I am especially curious about sizing. Is the Nano practical? Should I go for a smaller ring than I use with my CB-6000S, given the difference in shape?

Thank you!