The secret is actully something discolosed by another member here, and I cannot remember who, but it is simply to use a heated pointed tip to make a starter hole in the ball. Without this starter hole, it would be a killer to get the self tapping screw to enter the ball properly especially since the top of the ball is curved and the plastic ball is actually relatively hard. You possibly missed that part in the instructions.
The other part is to use an exacto knife. Since the seal is down below, we just need to remove a small circle above the ball, it doesn't have to be perfect, just expose the ball. Removing the botom part of the label makes it look neater and not a "mod job" but just a hole will suffice and perfectly functional. Yes, removing the label is tedious but it looks better...thus requiring more effort and time.
Three seconds and about two cuts with the exacto kniife will expose the ball. You can see on this sample ink that has gone past the seal on the original cartridge.
The other part is to use an exacto knife. Since the seal is down below, we just need to remove a small circle above the ball, it doesn't have to be perfect, just expose the ball. Removing the botom part of the label makes it look neater and not a "mod job" but just a hole will suffice and perfectly functional. Yes, removing the label is tedious but it looks better...thus requiring more effort and time.
Three seconds and about two cuts with the exacto kniife will expose the ball. You can see on this sample ink that has gone past the seal on the original cartridge.