Î have a Masser Kony e. Re grind retention with the doserless.
I and many others have had to modify the grind path to stop grind retention. I don't know the design of the SJ. With the doserless Kony, I had to remove the mesh between the grind chute and the large grind funnel. If I remember I had to unscrew the grind funnel and the pull off the mesh that is held in place with tape. This allows me to clear the grinds away. I don't think there are much grinds left. I only grind on demand, e.g. If I want to grind 17gms for the brew I only put 17gms in my modified hopper. So there are no beans left to grind when I have cleared the chute and spun the empty cones. Sort of 100% fresh. It is now sort of automatic and I don't notice the extra steps.
I totally love the Kony and its fast, even, clumpless grinds. The Kony is married to a Rocket Premium PID What a lovely couple. It believe getting a top notch grinder in one step is better that several frustating upgradeitis steps.
Yep i just checked, I think the SJ grind doserless funnel design is similar to the Kony's.