I ran across this forum while shopping for a new mattress and it impressed me as informative and impartial. I'm not new to foam mattresses. I inherited a couple of twin xl adjustable beds from my mother and made them into one king bed. It soon became apparent that the miserable coil mattresses needed replacing and I decided to go foam. I've noticed the DIY terminology used in this forum and that's exactly what I did, initially ordering one medium density 6" twin xl Larkspur mattress from foamorder.com (3" standard support, 3" latex), which seemed nice, but followed that order with the same mattress in firm density for the other side of the bed, which I liked even better. I wanted to see if a memory foam topper would enhance the experience, and I liked the combination of the Larkspur with a 3" 4 lb. memory foam and consequently ordered a matching topper for the other side of the bed in 5.3 lb., which I liked most of all with the firm density Larkspur. It would appear I favor a firmer mattress.
That was back in 2002. I never made frequent use of the bed's adjustable feature until I developed acid reflux. A few weeks ago, one of the beds stopped functioning, frozen in an elevated shape. I disposed of it, l leaving only one twin xl bed, very much like sleeping in a college dormitory. I decided to get a new queen bed and use a foam wedge with a fixed frame instead of an adjustable bed. On Saturday, I ordered a 9" Roma Natural Latex from Sleep EZ., already scheduled for Friday delivery (pretty darn good turnaround time I think). The Roma mattress, medium on one side, firm on the other, should offer a decent amount of flexibility as far as firmness, but if it still doesn't feel exactly right, I can always add a topper in latex or memory foam to fine tune my sleeping experience. I guess you could say I'm still, as you guys say, DIYing it.