Made a DIY Latex Mattress - Quick ILD Question

Putting the final touches on my queen size DIY mattress and I’d love to get some feedback on my setup. I’m 5,8 185 lbs, and a 50/50 back/stomach sleeper. With that in mind I’ve built a mattress that has a 6" firm dunlop core and 2" of medium talalay on top. I’m now looking to add a final 1" comfort layer and wondering what would be best for that. Do you think it would be ok to add a 1" soft latex topper or would that make the bed too soft for a prone/back sleeper? If so the other option would be to just add an extra inch of “medium”.

I am looking at this topper: 100% Natural Talalay Latex Mattress Topper