Royd Crossovers...Due a Service?

[Minstrel SE]

Hi

I was just wondering if my Coniston and Minstrel Crossovers are due a service and recap.

Time has marched on and I dont know how long a speaker crossover will perform at its best. we are talking what now?.... 30 years in one case...22 years in another

Im on Imgur now so this is a library picture of some Coniston crossovers. I also have a picture of Sapphire crossovers fror reference. Ive got no full idea what Minstrel crossovers look like

https://imgur.com/GcKrbJp Coniston

https://imgur.com/Bi0FhRq Sapphire

https://imgur.com/ker3dJH Minstrel nearest stripdown picture I have so far (Not my units as mine are minty looking)


How long do speaker crossovers generally last please?
Cheers
Martin