Any military project will take twice as long as planned, cost twice as much, and produce only half of what is wanted. When in doubt, empty the magazine. No plan survives the first contact. The enemy diversion you are ignoring is the Main Attack. The easy way is always mined.
Tracers work both ways.
Never forget that your weapon was made by the lowest bidder. If it's stupid but works, it isn't stupid. If your attack is going really well, it's an ambush. Never share a foxhole with someone braver than you. Make it tough for the enemy to get in and you can't get out.