E99 build and test thread

[RhoXi]

3/22/25 Roll Back Prevention

I had an idea while messing with the venturi last week. I thought how could I prevent the ball from rolling so far back into the bolt face? Then I thought what if the venturi was longer? So I got the idea to drill a hole in the front of the venturi and then thread it to accecpt a rod or bolt long enough to be flush with the bolt face.

After a trip to the hardware store, I ended up with a 10-24 x 2 socket head bolt and a M6x1.0 x 75 shouldered hex bolt. I wanted to try the idea with the socket head screw first in order to keep the venturi in the mix. I drilled and tapped (poorly) the front of the venturi and cut the bolt down to size till it was flush with the bolt face while installed.

It looked good but unfortunately that didn't cure my ills. I shot a few and velocity looked similar to last time. So far so good. Then I decided to shoot a long string as fast as possible and that's when it chopped at about 20 or so shots in. A definite stack clip as there was paint in the breech and feedneck.

Back to the drawing board but for now here's some pictures of my handywork.

[Kit352]

The micro switch on those are just normal 30g ones with the little metal flap removed. You can get lighter triggering ones if you wanted but they get touchy if you go to low. I think 15g is as low as you want to go.

[RhoXi]

Ah word thanks!

[MrKittyCatMeowFace]

If the paint is too small/oblong, you will continue to get stack clipping. Not using a force fed loader helps too. With 10bps being pretty much the standard now, non force fed loaders can keep up fine for the moist pork.

[RhoXi]

Lol that's a heck of a typo.

I've been using my Vmax+ becuase my Revvy wasn't keeping up when it double fires. Or at least I thought so. I'll give it a shot again next time. And yeah, this paint is small and not very round but such is the way of paintball in 2025.

[William the Third]

[flyweightnate]

I would try adding something soft to the face of that anti rollback bolt - like a cabinet door bumper or a mechanical pencil eraser. Steel is unforgiving.

Also, chamfering the top edge (like the Ego Cure bolts) might give you some blowback up the stack, but also might keep you from clipping that second ball.

On a lot of these, you have a .700" breech holding a .670 ball, so there's plenty of room to hit the next ball in line.