I thought it must be. I'll certainly help if I can, but the number one suggestion I can make is well nourished leather is happy leather!
I use Obenaufs HDLP for all my Equus belts. It will dark the leather a bit, but will completely smooth out that color and prevent some of the minor cracking you seem to have.
Also is the only thing I found that can fix the edges when they wear down a bit.
I have a lot of Saphir products and the leather feed you provided with my first order. Reno strips the color a bit and leaves a bit of a high shine. Also needs to be done fairly often. I find it works better only for the bridle leather.
For the harness the HDLP does a great job smoothing out the color and keeping the belt well nourished but not too shiny. Just needs a day or two to dry then can be brushed off.
Perhaps I will give it another shot!
Actually when I think about it, Reno smooths out color the best, where as the HDLP somewhat preserves the variations (which for me was a positive on my Scott as I like the almost Bugundy hue it has developed in places).