This might be worth a look if you've got time.
Recently watched one of
@Tillygti6 videos on the air stripper on his xti 50, where he was doing some testing.
It looked interesting, and I wondered whether it would work on my hft 500.
Rowan engineering do an adjustable air strip for the hft500, but I'd rather try and knock something up myself before paying out good money.
So out to the shed I went, and this is what I came up with.

By the time I got it finished all the neighbours were home and being Friday evening and the hft500 being pretty loud, I had to resort to testing it in the workshop, so I only...
I messed around for ages, and there were differences in group sizes with different settings on the air stripper, but I think I came to the conclusion that, unless you're a really really top shooter, and we're willing to spend a lot of time setting it up correctly, I wouldn't bother.
They look nice though