Snell E type ll crossover rebuild thoughts


I have an original set that I like very much. But am I missing something? They are getting old. I have rebuilt quite a few crossovers (cap replacement). Changing values, circuitry is above my skill level.
I hesitate to go the typical film route.

Has anyone performed this with success? Your advice, thoughts, cautions are as always, appreciated. 
128x128pkvintage
Found this from the type III, use the impedance curve here as a rough guide.  Measure both speakers before beginning, to ensure you are picking the better curve. One could be bad already.

https://www.stereophile.com/content/snell-type-eiii-loudspeaker-measurements
Thanks Erik. This is beyond my current skill level. It not beyond my learning capabilities though. I think the speakers deserve the effort that Snell/Voecks put in to the design. 

I have had them in storage for 5 months now awaiting their 1st hook up to my  newly acquired level 3/4 Audio Note system. This will happen mid June. 

Regards all. 
Enjoy the music. 
They are worth restoration for sure !!!! Coils should be good, don’t mess with those IMO
op:  If you want to be safe, just replace the caps in series with the tweeter. 
If the E's are working and sounding fine, leave them alone! The x-overs were built with premium parts. I have a pair of the first generation E's that I rescued from a GoodWill. They had rotted surrounds. Paid $18 + sales tax for the pair. Took out the woofers to replace with new SEAS woofers with rubber surrounds. Had a look at the x-overs. Beautiful work! So leave them alone!