My observations are:
1 I didn’t follow the instructions and printed it with a lot less than 100% infill, it cracked and broke.
2 The nut traps in the MPCNC_V2_RT0701C_Tool_Holder_-_Adaptor.stl fitted plain (not nyloc)6-32 UNC nuts, not metric
3 I used 6-32 1/2" cap head bolts to fix the back cover to the adaptor, anything longer doesn’t fit
4 It was a real fiddle fitting the mount to Ryan tool holder as the mount didn’t allow clear access to the screw heads.
I’m using this one and it works well. I think there is a version that mounts directly to the conduit and this might be a slightly better choice as long as you are not planning to try other tools like the vinyl cutter.
It looks solid and is mounting the Makita closer to the Z-rails than all other mounts I have found yet (in combination with the universal toolmount).
@zoominbc: Thank you for sharing your configuration. I thought there is no compatible dust shoe for this tool mount, with your info I made a closer look at the dust shoe you linked. At the end I decided to construct my own version with openSCAD to add some adaptations and make it completely mating with the tool holder.
My printer finished printing today! At the first sight it looks good.