One more thing. There is a lot of interference on the glideslope from arcraft holding at the holding point of RW29, they can cause a temporary loss of glide slope that can last upwards of 15-20 secs.
Also, at the last ISAF safety meeting, it was mentioned that the generators providing back up power for the LLZ and Glideslope are either without fuel or totally stuffed, and that as such there is no reliable source of back up power for the ILS. Just one more thing to factor in I guess. The VOR is generally reliable (4nm on the extended centreline), however the DME has been on/off most of the second hal of last year). I'm not too sure if it has been sorted out now.
Cheers