ProWin 8mm Split Mechbox

[Jayhad]

Originally Posted by Double Tapper

When you say the bodys need sanding down inside,how
much are you removing?.

millimeter or more

[Jayhad]

Originally Posted by Caped_crusadar

but thats with the 8mm, i was guessing it was the same way for the 7mm one

didn't the pin line up in the hop-up unit and cylinder head

[ILLusion]

Originally Posted by Caped_crusadar

i had to shim my upper part back, it was to far forward

but thats with the 8mm, i was guessing it was the same way for the 7mm one

Yes, that's exactly what was required of the 7mm. If you didn't have a pin to fix the cylinder head back a bit, you would have to shim the front to keep it back. If you left it forward, the piston would rest too far forward, causing the sector gear to crash on to the face of the first tooth. It would snap shortly afterwards if the issue wasn't corrected.

I assumed it was fixed for 8mm, but I guess not.

[Caped_crusadar]

Originally Posted by ILLusion

Yes, that's exactly what was required of the 7mm. If you didn't have a pin to fix the cylinder head back a bit, you would have to shim the front to keep it back. If you left it forward, the piston would rest too far forward, causing the sector gear to crash on to the face of the first tooth. It would snap shortly afterwards if the issue wasn't corrected.

I assumed it was fixed for 8mm, but I guess not.

they fixed it by including a thicker cylinder head,

below is mine from a silent piston set, compared to the one that comes with the prowin.