Direct Connection ( Mullen LA ) heads

Orifice Plates

I’d get a few to see where you are at in various places in the range.
100, 200, 300(@28”) is a good place to start.

That would be 59.8, 119.6, 179.4 @10”.
But I’d talk to Bruce a bit about your bench, and it’s total capacity before deciding on exactly what to get.

I wanted to be able to test several different ranges on my bench, so I bought the 100, 200, 300, 350, and 400.....all at 28”.