Got my first site online using T4 builder. I have to say the performance is great. GT metrix shows a good result. I didn't even use tools like JCH optimize. There was no need. Checking the site using some SEO tools also gave a good result. The tags are being picked up correct. Hope we see nice new blocks/features development for the T4 builder. I love to see more blocks for images, an option you can save your custom made buttons so you don't have to save a whole block. A standard build in 404-error page you can customize and some cool Seamless interaction effects when you scroll up of down. Great work!