Stats: 6’0, 190lbs (low bodyfat %)
Side / Stomach sleeper (60/40 estimated)
Proposed build (top to bottom):
Comfort: 2" Talalay 19ILD
Transition: 3" Dunlop 28ILD
Support: 3" Dunlop 38ILD
I chose the 2" comfort layer to accommodate my stomach sleeping.
Additionally, my hope is that this build comes out to a ‘medium’ firmness as a whole, with a fairly soft comfort layer (decent amount of sink).
Any recommendations/warnings? Thank you for your time!
Hi Alakowski.
Welcome to our Mattress Forum. 
Thanks for sharing your proposed build and stats.
This was my first question - it makes sense! I don’t think your transition layer is so firm that you’ll suffer on your side with a 2" layer.
I think chances are high that you’ll achieve this with the ILDs and thicknesses you’ve chosen. No recommendations or warning for you here. We have a great group of experienced DIYers here who may have additional two cents to add though 
NikkiTMU