FX Impact Power Block kit - Rubber balls?

[GA_LeadHead]

The power block upgrade kit came in the mail and inside the box along with the o-rings and set screw, there is a bag with 3 rubber balls. They look like the one that goes inside the spring with the slug power kit.
Why in the world did these come in the box with the power block kit? I cannot wrap my head around where these would be utilized in the block and plenum assembly.
Of course, true to FX, it came with NO instructions for the kit. Only a card to show how to properly measure o-rings.
Watching Ernest's video on the install, there is no mention of these balls.

Does anyone have an idea as to what these are for?

Thanks.

 

[Theman406]

Pretty sure, they go on the back of the power block, there are recessed holes.

 

[bigHUN]

#1 in the back of the Power Block (Rear Block the old name) there are 4 pockets, you place them to secure and allign the Mag parallel, so the pin/probe always pushing the pellet/slug direct-perpendicular. Originally there were 2 rubber balls, the upper two pockets, I tried 4 balls didn't worked out well replacing the Mag wasn't easy, I have now 3 (upper 2 and the lower-inner to the left, but I am using the metal Mag from eaglevision (lately they started supplying 4 balls with that kit, but I bought mine last year).
#2 for sure you will need a rubber ball in the Valve Adjuster if you using an upgrade - softer spring. Without that ball you will loose the 2mm oring in the Valve House (that hole looking from the Mag side. I shave it off first time power upgrade, and had to take the Impact apart again just for that.

 

[GA_LeadHead]

Well, I left them out, so i'm back to disassembling. At least the teardown process is not bad. Thanks for the help!

 

[Glem.Chally]

Well, I left them out, so i'm back to disassembling. At least the teardown process is not bad. Thanks for the help!

Don't need to disassemble to install them. It's a bit tricky but doable in a few mins.

 

[Keyman62421]

" slider bearings"