With regards to your rev query, I looked into this once as I find mine take a fraction of a second to drop when I change gear, could be what you are interpreting as a slight rise? Have a look here
http://www.subaruforester.org/vbulle...ow-drop-52933/ It looks like it's meant to happen? I read somewhere else that a mapper can take the thing out of the ECU program as well I think.