Earlier this year, mine were up to a 4g. When I was gauging up, I did it very slowly. At first, skipping one size, (i.e. from a 16g to a 12g) and once I got to an 8g, I went up one size at a time, leaving the new plugs in for two weeks before I gauged up.
Seemed fun until I got to doing shows. During Ragtime, I had to cut out little circles from bandaids to cover them up, and I decided it wasn't worth the hassle. I took them out, and within a week, I was able to wear regular posts.
"what have we learned? Don't smoke... don't do drugs and don't sing 'Defying Gravity'." -CATSNYRevival