Today I got my Proton Flush Mounts mounted together with the Tail Light from CustomLED and I would like to share my experience with you.
After uninstalling all standard Turn Signals and installing the LED Flush Mount Turn Signals and the Tail Light with the Turn Signals inside we tested if they would indicate with the standard Flasher Relay and they did. The only thing was that they'd indicate alternately, but the speed was normal.
So we'd install the IC Relay and now they indicate both at the same time with normal speed. No resistors or diode necessary.
For sure this combination isn't the cheapest but I think it is the best. The old people in Germany say, if you buy cheap you pay double.
Have a nice day and keep the good times rolling.