I did this and the problem still exists and now the mags are very hard to remove when it jams. I bought mine at airgun tactical unfortunately and they offer no help or refund. That’s the worst site on the net.
I bought a t9 4 months ago and it’s been awful. The gun jamms constantly even with the AEA pellets and the JSB Diablo and hades. I feel like I threw away a thousand bucks. Can’t get 3 shots without a jam.