David, what is the name of that white stuff you are using to seal your stuff with? Do you have a name or part number? Where I can get it? I just use the white teflon tape stuff but I'm sure what you use is better.
I have used both the Greddy adapter and the NISsport and find that the Greddy is much easier to use for the qr25. A word of caution: If you go with the Greddy, you will want to get a couple of feet of stainless line to route the sender to somewhere other than the bottom of the car. The Greddy is also much easier to use for an oil temperature gauge as well. PM me if you have any questions.