I could do this, but I do want some write caching via Memory.
I don't think it makes much sense to ever waste an ssd on write caching (it will wear out it's lifetime that much faster, and the hd only needs enough buffer to reach burst write speeds, and is why I only ever set my write cache to 128MB). However... I do want the read caching extended to my ssd, currently there's no way to enable read/write, using memory for writing only, and read partially in memory and extended to ssd without using two versions of the program (and a ton of memory!)
Thanks for taking the time to listen to my request.