I just joined this group...and saw this post.  I built the "Frankencade" a hundred years ago.
I had a few woodworking tools and just kind of went for it.  What I didn't have was any clue how to
do the controls.  I thought the logic of using the prefab controller seemed like the way to go and allowed me
to focus on the rest of the thing. 
I sent some pictures of it (taken in my dirty garage) to some friends and didn't think much about it.
I hadn't planned at that point to stick it out "in the world".
They shared the pictures with some friends...who did the same...and pretty soon it was showing up
quite a bit.  I learned 2 things.
1.  With no information, the collective "internet" can be both kind and harsh.  I was beat up for using the xarcade. I was beat up for not cleaning my garage. Wow. I had been happy that it worked and I could play Donkey Kong in my house.  
2.  The fact that I was a "noob" building my first cabinet didn't seem to count for much.  I suppose the compliment was/is that I'd done a pretty decent job on the rest of it...so why not take the controls the rest of the way. Good point.  I'm working on that now.  I did a minor overhaul on the cabinet after all these years and the xarcade replacement is a placeholder for the home-brew controls that will go inside.  This site is helping me a great deal as I begin work on some new cabinets and pick the bug back up.