Help With Going 3Way From 2Way JBL's

I have been wondering for some time about adding or making my speakers 3 way. First off I am running JBL D130's with LE175 horns and drivers referred to as potato mashers. My crossovers are JBL N1200.

I built these in the mid 80's I think my crossovers were beginning to get tired, They have the old paper and wax cap's and they were sounding muddy and I purchased some inexpensive 2way crossovers from amazon and it seemed to bring these speakers back to life. Blew me away how much better they sounded, which brings me to this.

I was thinking about buying new tweeters and use the LE175's as midranges and getting new 3 way crossovers. Ideas or suggestions. I will probably try to rebuild my JBL N1200's and maybe just leave it at is if rebuilding makes them sound as good as it does now with the cheap 2 way crossovers. I know the N1200 are completely filled with wax, and would like suggestions on getting them apart

Rocky