Hi Muskygary,
Yes I have tried the tin. There is a fine line with the blade baits. I have also milled out an old Zonar mold to fit the medium blade in the 1/4 ounce (lead) cavity... Should work, right? Not so much. Like I mentioned, there is a fine line to having enough weight to stabilize the bait on the retrieve and losing control of the vibration. If there isn't enough weight they vibrate wildly and almost start to helicopter. To use them vertically, they were ok, but to cast and jig them they were a bit out of control.
As you saw in the video, my best solution has been to take a side cutter and nip off some of the belly end of the lead to try to get it close to 3/8. I'd like to see Do-It engineer a 3/8 body for the M size blades.... (hint hint...). I don't think that I am really at 3/8ths when I trim off the lead. Maybe 7/16th. But the problem I describe above may be the reason that they don't make the 3/8th for the M blade. Jerry or Mark may be able to comment on that.