It's really great to have another DIY guy on here! This really isn't the forum for the DIY group, but there are a handful on here. You really just can't beat the value proposition for DIY, and you get to learn something along the way here too!
Another item that is refreshing--You came in as the new guy asking for advice, and you ACTUALLY followed the advice! Many newbs will come to this site with their own ideas, just looking for validation, then they get butt-hurt when they are told "that's a bad idea and you need to learn more before you proceed on this".
I'm not a woodworker so I haven't done any speaker builds myself, though the kits make that a poor excuse. Personally, I've really been wanting a set of the ER18s or the JB Solstice (same designer as your tempest, using all Morel drivers in a TL cab".
I'm more on the electronics side of DIY, and I have several non-audio DIY projects too. I have several threads on here that document my work, but it seems like some of my pics aren't posting anymore. Dunno what happened there.
I'm somewhat old fashioned and I know that causes some frustration sometimes that often times manages to sidestep the easy answers but the folks here were surprisingly accommodating.
Sometimes my posts seem to be the typical internet validation ploy, but I've been DIY'ng for my whole life, and at one point, was surrounded by friends who strived to develop self skills. A competition of sorts, yet not for one-upmanship, but just everyone trying to do everything well, and we all learned from each other and perpetuated our own versions of affordable greatness and mostly out of fun and necessity. It was a great way to live, and we all always had something to look forward to every day that we were passionate about. Made the mundane jobs and chores we all have to do every day, much less so. And that's all I am looking for. People that share the same interests and goals and that we don't ever run out of things interesting to talk about.
DIY is one of those gifts that helps thwart the ever present corporate designation with the state of a person's personal economy, dictating the quality of their personal possessions, and ultimately their life. How to avoid the incessant barrage of ad agency influence over everything we do, with their messages being essentially insults that are tailored around the mentality of 10 year olds. Basically, how to 'opt out' whenever possible.
Yes, I listened to the experienced people here. At the very least, I took what they said and researched it further to see where it fits. I found that I did not get one wrong piece of information, but instead, a lot of options. None of it fell on deaf ears. Also, most of it was pretty much unanimously agreeable to some extent here as well. It's so nice not to have to tip-toe around ego like with just about everything else these days.