I intend to install the Aerosport center console and Andair fuel valve so one of the obvious "upgrades" is providing side access to the tunnel near the fuel boost pump so that I don't have to dissassemble half of the plane to inspect or change the fuel filter. At this stage, this is a pretty easy task and I am glad I did it now rather than at my first annual. I feel pretty bad about the fact that I purchased this access plate cover. This is the access plate from airward. I thought it was a great idea because everything was set and ready to go, no measuring (in theory). I say in theory, but I ended up with one of the plates where the rivet holes do not match the rivet holes in the floor pan. So I ended up offsetting the backing plate and match drilling new holes. Given that, I would not recommend the cost of purchasing a plate from airward. Sorry airward.
Finding the location / offset
Marking and cutting