Haha! I never had one, but heard those dodge daytona guys back in the day would just tighten up the wastegate and let 'er rip! And hope she didn't blow up!
Hehe yea well it was the early days in the 90s... Usually it was a bleed valve that just didn't tell the ECU how much boost was running at first and that blew up a lot of engines...
Then they discovered a grainger valve from the late Gus Mahon and his 13 second minivan.
Lots of mechanical boost controllers were essentially based on that.
Anyway going to far off topic now.
There is almost always a cheaper solution to things. That is capitalism. Getting to the one that works best for a good price is what I was trying to build. I could also use a thinner plate and make it a little cheaper but I like covering the boot lip.
The big washer is pretty similar to what I made and that is fine. Spending time vs money or the fun of your own soln is often what car hobbies are about.
Here is what my thin version looked like in comparison. It was powdercoated and used a stainless standoff and jam nut. It worked but I think the 1/4" thick version is nicer.