After a long wait, I got a pair of 2405 and a pair of 3106 in order to retrofit my 4320 with UHF.
2 Questions:

-I took the lenses off the baffle to unscrew the horn (more on this later). They were glued. What do you people recommend to reattach them? Velcro?

-Previous owner (John Entwistle) had a on/off switch fitted for the horn. prolly to use 4320 as some LF unit. Anyway, upon inspection, I find out horn was wired "backwards", i.e.: red terminal on the Xover was actually connected to black on the horn. The switch terminals was where inversion took place.

Is this normal wiring? Was this horn wired wrongly?

I haven't checked the other speaker yet.

thanks for any help