OP,
I answered you on your other posts. Wiring with diodes, whether they're in fancy packages (i.e. The kits from RV stores and Camping World etc,) DOESN'T cause any issues, that is if you have a basic knowledge of 12VDC electricity. Why folks think their car's going to go up in smoke if they go the diode route is beyond me. I've only done to maybe 20 - 30 vehicles, pretty sure none have burnt to the ground.
Everyone's got to work to their limits, (Sorta like a Clint Eastwood "Dirty Harry" statement) so, if you're not comfortable cutting a wire and installing a diode, well, then you better drill some holes and run extra bulbs. Your choice.
Scott