I would use the reflector mounts on the front fender.
Many have in the past, and if you are using very light weight "notice me" lights like say
Hyper-Whites then that might be a good spot, but once you get up to the weight of small Denali lights, metal fatigue seems to be the norm and bracket failure occurs
(I might have the time wrong) around 12-18 months. The fender bolts farther forward have about double that life but eventually fatigue and fail as well
(not the bolts themselves, but the underlying bracket). When the failure occurs at the fender bolt it can cause damage to the plastic fender mount area which usually requires some Epoxy putty/JB Weld sculpturing artistry.
However there seem to be a couple of related solutions (so far), Twisted Throttle sell some mounts that seem quite stout and DIY versions that mount at the same spot.
More info here:
http://www.zggtr.org/index.php?topic=13970.0 ----------------------------------------------------------------------------------------------------------------------------------------------------If the lights are round would they not be parallel to the ground regardless of where they are mounted?
Well yes, assuming that works for the aiming as determined by the user, but I was referring to the aiming axes one of which could be made parallel to the ground by the use of the wedged mounts.
However, I think I have determined the answer to my original question, and it isn't about aesthetics after all. I was assuming that because the auxiliary lights available are simply round reflectors (even the ones in some square or rectangular housings are just multiple round reflectors inside those housings) that there is no real need to have the two adjustment axes in any special relation to the ground, however I forgot that some aux lights are still made that actually do put out light in a specific pattern due to a special reflector/projection lens that would be defeated by mounting at an angle. The mount designers probably had that in mind when they went to such lengths to get that angle right. Once again I ignored the little bell that went off when I started this thread, usually that bell means I should think about it longer before asking the question. Hopefully someone found something useful in this thread that I now realize I probably shouldn't have started.
------------------------------------------------------------------------------------------------------------------------------------------------------Marty, sounds like you did the same thing I've been working on this weekend. I'll post some photos once it's all done.
Maybe so. Below are photos of mine. Not pretty earrings, but very effective ones when the high beams come on. Cheap earings too. I don't think I paid over $80 for lights and mounting hardware.