Hi again Phoenix,
This past week has been hectic so I haven’t had time to write back again. And a lot has changed in a week, mattress-wise!
To back up a bit…
As my iComfort became more uncomfortable over time, I decided it had to go and I would get something new, so I put it on kijiji hoping to get a few dollars for it. Then at some point through all the looking and learning and testing, and still not seeing a clear answer, I thought maybe I should see if I could improve the iComfort instead - which is when I wrote to get your advice. Just as I had started on your advice to take incremental steps, I got a call from my kijiji ad, and sold the iComfort set!
Due in part to Ikea’s return policy (discussed here), I decided to give the Sultan Edsele a try. I have a new bedframe coming this Friday that has a headboard, footboard and side rails, but with only one slat across the middle and a center leg. So I also bought the Ikea Lade and Luroy slatted bed bases (and will return one or both if they don’t work).
If it matters, I did sleep with just the iComfort mattress on the floor (only two nights) before I sold it, and it was still uncomfortable.
Thanks again for all your help so far - and sorry about the u-turn! If the Edsele is still too firm then I’ll be asking your advice on how to make it more comfortable.