I've spent most of the last 10 years doing some variation of SEO or Affiliate marketing, always happy to try new methods regardless of how white hat they may be. Just fun to try and see various methods for the most part. For what it's worth, Google has always been surprisingly terrible at reacting to spoof sites and use of their trademark in domains. I am big fan of CSE, I use it as the primary engine in over 400 sites ( paid version) and enjoy the analytics integrations, exclusion options and often try to use it for many out of the box filtering techniques in sites ( how about an agent locator search by zip code using only CSE and schema)

Anyways, my first application of it was for toolbars downloads for webmasters with CSE for custom searches just like your blades. Profit from each download and the Adsense. It brought about 22k in a year between CPI, Adsense earnings and some built in afflinks for hosting and domain tools plus Amazon cookies for about 6 hours of work and marketing.

The point. The joy of CSE is that you can brand as you please, what you are making and the exposure you just got for this concept could be a decent passive income so there is no good reason to risk infringement and repercussions on the Adsense side when your project could easily give you some cash, if you don't need it, then donate it but why risk that aspect, Google doesn't need the help for promoting the product, it powers many an internal website's search for the paid product. Buy an alternate "bladesearch" domain and redirect it and see if it gets any love on the merit of the search concepts you devise.