I will answer your question with a question for you, Do you want be 50 miles from nowhere when your bike sputters and dies and you find red hot wires hanging below your ignition switch??
The headlights switch of while you are staring only leaving the pilot lights on the problem is not the starting, it is the constant high load of the power for the headlight coming thru the ign switch. With the EB or homemade relay harness you only end up with 3amps instead of the 20 + going thru there so without the load the ign switch no overheating
I made mine and have made them for a few of my mates in fact I will be putting one in the post for Mitch today cost of parts is only $40 compared to more than twice that from EB the other advantage of doing this is your lights will be brighter cos the power comes directly from battery