I had that teflon block move after 7 mags worth (200 + bb's). For that teflon block I superglued it to where its supposed to be and let it set for a few hours... iv run about a good 500 rounds through it since then and it hasnt even budged.. just make sure that when you do do that ... to take out the valve tube (the black tube
) and put it back in after.. got this idea from the WETTI technical summary thread.