1/16th versus 3/32nds, I hate to say this, but it's up to you. You do good work. you're conscientious. If your wall is flat, if you have good trowel technique in terms of keeping a steady angle as you put thinset on the wall so you put an even amount of thinset on the wall, you can probably get good results with 1/16th.

The tile is rectified. That's good.

Your wall is flat. Doubly good.

If the tile is flat, which it should be, you should be triply good to go.

I like a Felker TM-7 blade. Sometimes cross-branded under Husqvarna, but it's a Felker blade. I use it for hard porcelains and even granite. It's my favorite go to blade with porcelain.

When cutting inside "L" cuts, I have a moving table saw. I'll slide the table forward, cutting into the tile. When I get to my stop line, I'll rotate the front edge of the tile (the end away from me) up into the blade, keeping the rear edge of the tile (next to me) "hinged" to the fence of the sliding table. It squares the cut. I get a nice clean inside cut.

The larger the tile, then sometimes the less you can hinge the tile up. If need be, and it's usually not, I can clean up the inside 90 with the light touch of a grinder.

If a picture is worth a thousand words, let me know, I'll post a photo.

HInging, yes I think I know what you mean. So that the total thickness of the tile has a perpendicular cut, and not an arched cut in the shape of the blade. Is that right? I can touch it up with my grinder. I will have to practice on a scrape after I get my first few courses laid. If you have a picture that would be great too.

I know I don't want 1/8" space. I have that in my kitchen backsplash. I think I will try the 1/16".

The Felker TM-7 blade, I will look it up.

Thanks so much.

Just bought the Husqvarna Vari-Cut 10" Porcelain Tile Diamond Blade for $54 and free shipping at "Tools 4 Floors".