I used DP270 with this mold and some small clamps . plugged the two small holes with a few small pieces of o-ring to prevent leaks. Unfortunately I did not put enough oil or mold release on it for the mold to survive the cable extraction. the design could use a bit more room around the casing of the cable to allow better flow, worked well enough to be a success!

first attempt failed on my part as I tried to add 3 copies to the plate without using STUDIO , just going through Handy app. (glad I caught it before wasting more filament. ) Wife enjoys the key chain!