I guess I am confused. Did you install the 6" or the 7" versions?
ANd what difficulties did you run into? Any mods needed or was it simply install and re crimp the wiring pigtails?
I used 7" Maxxima's on my Burro
. The nice thing is this is a standard City-Bus tailight which should be available for years to come.
On the older round-light Burros the only "mod" you should need to make is to possibly tap some new screw holes (I also used stainless-steel screw to stop the rust), if you get the 3-wire Stop/Turn/Tail unit wiring is nothing special.