I think that the Loctite would help in retaining the grub screw if you only use pinned blades. I reckon the continual vibration would see them coming loose. I suppose it is better, now that I have slackened off both screws, to nip them up when using pinned blades (sort of belt and braces), I have a stock of 6mm grub screws or maybe remove the grub screws and only fit them when needed ie when using unpinned blades. Who knows either way is ok 

Hope to have a play with it today but it is a bit wild and windy and the rain ain't far away.