2425H suitability?

[pos]

I'm kind of convinced that the 2435 only works well on the Array horn.

That has also been my experience (H9800). When put horizontally it is also quite good, but the directivity tends to collapse more rapidely above 10khz (due to the poor phasing plug of the 2435).
The array horn is really close to a 2344...

I have yet to try the 2450SL on the PTH1010 (I'll be trying the 476Be as that is all I have on hand at present)

I can fix that if you want, lets to a swap