Just wanted to post that I rode in a modified seat today ( 9/16 ) . I did willingly sit in the test seat outside and the TM suggested I ask for the modified seat. Slightly embarassing but I am what I am. I didn't see what lights lit up because the sun was really bright. But I went up as a single rider and asked for a modified seat. The wait time posted was 40 minutes. I was off the ride within 20 minutes at most so for once, at this particular time, being fluffy was an advantage.

The seat was very comfortable and the ride was awesome!
I am 5' 6" and weigh about 185. Measurements are 46/42/44. I was wearing a thin cotton dress.
This really surprises me, at your height and weight I would not think you would need a modified seat.