Vitamin,
Ok, I'll play.
1st, if you have a Lee Classic turret, you need to measure the size of the handle you already have. This is at the threads and just above. You also need to measure above the threads to find out the diameter they're using for the basic handle. If you don't have the press yet, the bar on the Lee handle is 5/8" thick.
2. Now that you have this measurement and know the Dillon handle shaft is 5/8" thick, you'll immediately realize the Dillon roller handle will fit your press simply by removing the nut and inserting it into the clamp you already have. You can then add the nut to the threads on the bottom of the handle if you wish. Or not.
I'm thinking that's a big YES. (grin)
Dave