2008 R25 where is the fuel sender unit need to cut

[jimbeam]

I need to cut an access hatch in my 2008 R25 to get at the sender unit in the fuel tank. Also probably will have to cut another for the fuel hose connections and inspection port on the tank. I need the measure for both and possibly photos.
jimbeam

 

[NorthernFocus]

Here's a link where you can download dwg of the fuel tank. There's not an inspection port on it.

http://www.tugnuts.com/viewtopic.php?f=7&t=65&sid=34d9b84863573736e8a120b6640aeae5