Smitty: this post was dated 11/2006!?! I'm sure DM has figured it out by now.
And your recommendation of a magnet under a stacked LB poses several problems for anyone playing in the MPFL, and especially those that do not.
A. Stacking LBs is illegal in most leagues, unless they are a base-length behind the DL or in a gap.
B. Magnets are illegal in most leagues, or at least within 15-20 yds of the LOS, so a TTC cranked all the way to one side or the other to hold the LB in the general vicinity would accomplish the same thing.
Don't you know that magnets ATTRACT attention just like chum ATTRACTS sharks!?! You say the OL would be way downfield (how long is the board on for the initial "snap?") and then the LB would have a clear shot? Against a Rookie, maybe, not a veteran Coach. If my OL didn't have a DL lined-up in front of him, you better believe they're looking for a LB at the next level!!! C'mon, now, you know not many Coaches would just let their OL fly downfield!?! 
And, even if your DL played possum and let the OL push him back, wouldn't he get pushed back into the LB on a magnet?
C. Stoppages, again, aren't the mainstay in most leagues. The MPFL and my traveling ILLINOIS Season that I did last year are the only two leagues I know of that use stoppages.
D. If you require the D to man-up on 2 or 3 OL, then the O can increase their splits. Or using stoppages like an initial snap, it wouldn't matter. Even though we use the Strategy Divider here in the MWEFL for all plays from scrimmage, we don't use it on GL situations, 4th and 1s, FGs or EPs, because in REAL life those gaps get closed and it's ALL push. BUT ONLY IN THOSE SITUATIONS, NOT THE ENTIRE GAME!?!?!?!?!
These are more or less questions, not accusations, Smitty! Everyone plays differently, so these are just my thoughts.
