Hi again. Sorry but I overlooked 2 tips which may be useful. Here they are:
1. I have found on some of these castings I'm not able to get them to lie nice and flat on both of the long sides. Seems they miss by a few thousands. Here's a way to remedy that...snap a double edged razor blade in half. I just open the little holder and take out a couple I've already used. It goes without saying to be careful here. Do this with two blades. Now mate the air horn to the bowl and tighten just a bit less than finger tight. Line your blades up the way you want (you can see what I did below):
https://photos.app.goo.gl/5VxdabFypuDsM2zQ8And now tighten the screws and heat the assembly to 400 degrees and let cool naturally. Here is a closer view of those 2 half blades:
https://photos.app.goo.gl/9wCqeo6GY6etdHDT9Also, occasionally the fuel inlet end won't sit flat no matter what you do and there are no screws to help pull it upward. Here is how I fix those:
https://photos.app.goo.gl/z712zMBk3t16JAzh9You need 2 pieces of 3/8 inch steel for this and a couple of 5 inch C clamps.
More about one of the special C clamps I have in a moment. Clamp the bowl between the two flat metal pieces and using wood pieces (and you may need a metal spacer as I did), shim above that part of the bowl. Clamp this down well and bake/cool. It may take 2 times to do this.
And now...My special C clamp. Lots of guys use clamps made in China. They're common and I have some of those, too. In fact, in the image below, you'll see one marked with a green arrow that was made in China. However if you want a really SPECIAL clamp, you have to search a little harder and find one like the clamp marked in the image below with the yellow arrow. I've looked and looked on the globe and I can't seem to find a country named CHNIA, but I know it is out there somewhere.
https://photos.app.goo.gl/JcA3u97GvNpgKvgf6