I ended up modifying the entire chest area on mine pretty heavily. Removed a bit of filler here & there, but also added some in parts as well. I left the arms & legs as they were and it worked out quite well since the latex did shrink those bulkier parts down a little, but not too much. It's all up to you as to what type of physical features & overall body shape you'd prefer your Pred suit to be.
I plan to post up a tutorial on my suit soon since I took a ton of pics throughout the process. It was my first time doing a full bodysuit so it should be a good one for many here to use for a solid reference in the future. My suit took me around 3 months to complete, but as always, I also did a bit of my own experimenting w/ a bunch of new ideas & materials along the way too. It was all great fun to do, but it also offered up plenty of frustration throughout. Still, I'd really enjoy to do it all over again...someday.