Be sure to read and understand the caveats mentioned in the first few paragraphs before you proceed.
At one point, you’re instructed to "find yourself a source for a watchOS 3 configuration profile,” but the author of the article neglected to provide a link. I went ahead and found at least one source for you; here it is.
If the link gets removed before you read this post, you can direct-message me for the info.
Man, I always get a little nervous when they talk about stability issues. I'd especially hate to have any issues with my phone OR watch while I'm traveling on vacation, which I leave for in 1 week and will be gone for 2. By the time I get back, it will be Mid-July, and maybe they'll have the public betas out there ready for release. One can hope anyway...