This is making me think of going a different direction as well. The thread may be old but I am living the Trident III issue now.
Research the Iwaki pumps. There are hobbyists who claim to have used them 30 years straight on their system. No seals, no leaks...
They're probably the most expensive though since they're made in Japan.
I was set on a reeflo dart until I started reading people's experiences

