Looks like you are correct as I cannot find the Stable for the HM4 either.
Do you have a reason for not using a Weekly? I personally use them & they have not caused me any issues thus far.
Ive read a couple reports of people complaining about the notofication led not working, or the MTP file transfer not working... I was looking for a bug free rom
Fair enough, I suppose you will just need to try it & see. I would backup your current ROM & data using TWRP so if you have any bugs you can restore back nice & easy.
Looks like you are correct as I cannot find the Stable for the HM4 either.
Do you have a reason for not using a Weekly? I personally use them & they have not caused me any issues thus far.