HI ... It looks like the vast majority do not recommend it, but I had both done at the same time 27 years ago. (Wow!) Actually, it was the 2nd BA ... The first was from flat to "B", then we did the SRS (or GRS if you prefer) and a "D" size BA on the same day. I woke up amazed. Groggy, but still excited. I did need help getting out, getting home ... If you're all alone it might be more difficult. If you have a helping partner, it might be OK ... It was for me, but I knew what to expect with the BA portion since it was my 2nd go-around. My reasons were that I could not be away from work forever, there are still practical considerations for all of us! Good luck and good sailing! Have fun with it ... It's been 27 years, but I still remember the day. It's an unforgettable experience.