Hi onethinline,
Thanks for the update and for letting us know what you ended up doing.
Innersprings have a different and more linear compression curve than latex which has a compression curve that is more “S” shaped (see post #28 here). The specific reasons why one may work better for some people than the other in terms of spinal alignment would be far too complex to be able to analyze outside of a lab with sophisticated measuring equipment but the most important thing is that your testing indicates that it does which is all that really matters.
I’m looking forward to any additional updates you have the chance to share once you’ve had the chance to sleep on it for a bit.
Phoenix