Motogadget Handlebar-end Blinkers

[Gsnyder70_imp]

Anyone have any experience with blinkers that are mounted on the end of the handlebars? Here is a link to some made by Motogadget:

http://motogadget.com/en/turn-signal-lig...-disc.html

Revival Cycles appears to be the U.S. sales agent, but there may be more.

They are kind of pricey but look cool, but they bring up one important question in my mind that I was hoping someone could help with. In order to run the lights to the ends of the handlebars, a hole needs to be drilled in the bars to let the wires out to be connected to the wiring harness. Will this hole weaken bars to a dangerous level? The install guide recommends a 3mm hole, but I found a link to a build where the hole is much larger, see the picture attached. Here is a link to the build:

http://revivalcycles.com/pages/homegrown...onda-cb750

At the very least I figured I'd share this cool build and parts.