[e-luder]

+1 above. Kevorkian hit the nail the head on that one.

If that doesnt work, you can file the actual rail on the slide itself. Its tough to do if you dont have the right tools.

Also, depending where the slide is grinding (ie. it may be grinding on the frame) you can "raise" the rail guides of the lower assembley by puttitng duct tape on the bottom pf your chasis. It will raise the height of your slide off the frame just by a hairline which is enough clearnce for a smooth cycle.

The GunsModify zero hammer I generally dont recommend to people because they cause the problems you've described. It requires a decent amount of work and break in period to work efficiently. they are up to version 3 of this product now and im sad to say that it hasn't really improved all that well from its previuos iterations. The website claims that you need to rack the slide about 100 times to break in the hammer bearing but even doing this, it still needed modification. Sometimes, i had to file a bit off the hammer bearing to get it work smoothly. They worst one i recently bought needed the hammer bearing modified as well as the bBh. Plus it requires lots of grease as it tends to eat the bbh if the hammer bearing isnt smooth or if it protrudes too much.

The spinning wheel works much more effectively than the Zero hammer IMHO. but that's just me.