Hi Chris,
When you say that the spokes are loose, are you suggesting that the nipples with Loctite applied have actually come undone, or could it perhaps be that the spokes have simply become loose because they have stretched slightly?
It's possible that the spokes might not be nice and snug against the side of the flange, in which case there is a good chance that the right-angle bend in the spoke will gradually increase with use, allowing the spokes to effectively lengthen and eventually become loose.
On my MK1 Pie, I had to fit two 0.55mm thick washers under the heads of all the spokes to ensure they were held tightly against the flange:
I had no problems with loose spokes for well over 12 months, but a few weeks after I increased the controller's output from 20 to 60Amps, I had to re-tighten several of the spokes.
Surprisingly enough, I haven't had to touch them since, which is pretty good considering that I regularly transmit up to 4HP through them and also do a fair bit of riding across bumpy fields and on little used country lanes which are full of pot holes!
Alan