DIY Hybrid - Looking for a 2nd opinion

Mattress Talk Materials, Specifications & Designs
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1

I am 6’3", 180 lbs. Side/stomach sleeper.

I want to build a hybrid mattress. My first draft:

Legget and Platt 8" Combi-Zone Pocket Coil
2" Foambymail Dunlop Medium Topper (29 ILD)2" foambymail.com Dunlop topper (ILD 29)
Arizona Premium Mattress 2" All Natural Talalay Latex Topper
or
2 " Blended Talalay Latex Mattress Topper

I’m torn between the 2 top layers. I assume I’ll need to go with the soft talalay due to being a side sleeper. I’ve read that the 8" Combi-Zone makes for a very firm base. I like a firm mattress but like I want to be comfortable on my side, but able to sleep on my stomach without sinking in too much. Open to suggestions.

Should I go with a firmer transition layer? From what I gather, a 29 ILD Dunlop is still fairly firm. So I thought that would give a good middle ground.

Is a medium talalaly layer ever used for side sleepers or would that be too firm?

2

Being a side sleeper and stomach sleeper at the same time makes it hard to get perfect because they are basically at odds with each other (firm vs contouring). I would probably go with 2" of 22ILD talalay layer on top and 2" of 28-29ILD dunlop below to go over the coils. This should give you a firm feeling for your stomach but still allow some contouring when side sleeping.