Ok, here is what you do.
Go to Home Depot.
Get a large bench vice.
Go home and mount it on a good sturdy table/workbench (oil and clean it as well).
Open the jaws about an inch or so.
put the handle at a 45 degree angle so you can close it with your left hand.
stik the index finger of your right hand in the jaws and tighten it.
This is how much it will hurt your .45 if you try to tighten the slide. If you want a tight target gun, take it to the gunsmith, dont try this at home.
"Patriotism is supporting your country all the time, and your government when it deserves it." -Mark Twain