I use a little ratchet with a bit in it. First did it with the stock phillips screws, had no problem. Later switched to the allen head screws from
newbonneville. Just be sure to hold that tube thing with an 8mm wrench while unscrewing jet. If you take that part out, a tiny brass seat will fall out and you will have to carefully take the other side apart to see which way it goes back in. Mine fell somewhere behind the battery and it took me quite a while to find and retrieve it. I remember it like it was yesterday.
