TLF 550 upgrades

[Blue Spot Octopus]

So I have this reactor and I want to use it for GFO.
PhosBan Reactor NPX Screen - Two Little Fishies
Seachem 28637 Phosbond, 4 L
NPX Bio Pellet Adaptor for Reactor 550 - Two Little Fishies$19.99SaltwaterAquarium.com30-day return policy

So the instructions state to use the NPX screen when using the NPX Bio Pellet reactor, since I will be using Phosbond first, should I use the NPX screen or the sponges?
Has anyone used the NPX adapter? How does it work with GFO? I do have Rowa Phos but it is such a PITA I am going with Phosbond first.
I will probably convert it to run Purgein in the future, or use it on my 150 reactors.

 

[Blue Spot Octopus]

So I have spent several days trying to find one video on how to putt his reactor together, all they show is the 150 reactor, or simply a 550 running, I try to go on TLF website and it either does not work, or it is not compatible with my my MAC.

I tried putting together and the tube simply falls out of the red screen, talk about poor fit and finish, oh it's close enough. When I finally got it together I nearly broke it trying to get it apart from the exit tube and the lower tube.