@Vipersan : I did not go too much far away with my Jaeger 1224. But I can confirm we (I myself and with a great help of
@Trust1) had hard times removing that piece of metal to unleash triangular part. We where trying to press it out with another bolts.... it did help little bit. I think we finally succeeded only after hammering this bit out with brutal force. I mean, just apply more force to get this thing out in the detection of red arrow.
View attachment 75864 Those things are very similar to bits we had (and still have) on or bicycles.
View attachment 75865 View attachment 75866 Perhaps they are even more or less same.
Those 1224 are great, but, unfortunately they are very old and different metals like steel and aluminum (or some kind of aluminum) after staying together after so long time, have chemical processes happening between them making this join very strong.
So, direction of red arrow is right, but it is really hard work to get things moving. Just continue with applying more force in right detection.
Perhaps, you can drill it out with 6mm drill-bit.
Wait a minute, I have so short memory, perhaps we drilled that bit out.... Maybe Trust1 can confirm it.
Speaking about back motor cover (the plastic part), I think it is real problem. I have no idea how to make it out of nothing.
Certany, your motor has some future, but lots of work should be done on it before it start to turn your antenna. Good luck.
Those things are very similar to bits we had (and still have) on or bicycles. 
Perhaps they are even more or less same.
View attachment 64532
