Unfortunately it needs to go the CPT yes for it to be serviced by the agents unless you opt for one of the suspension guy sup north ( where I'm assuming you are ? )
The reverb is an over engineered piece of garbage , that harsh but it is.
If you service it within the intervals it'll give years of good performance , but only if you stick to the maintenance schedule.
Sorry I don't have anything more constructive to say but I've rebuilt maybe around 20 myself and its a shite show
Cartridge droppers are better in terms of reliability ( especially if you don't maintain them )
EG Lyne , One up , Bontrager , Transx
There are some very good hydraulic posts that are slightly ( ever so ) more reliable than the reverb , like the fox transfer but I put it in the same class as the reverb.
Then there's the grand daddy ... Bikeyoke ( similar idea inside as the reverb , but super reliable and has the ability to be bled on the bike by the user ) its service intervals are also way longer.