[TowerTalk] Dipole Ends

[Tim N9PUZ]

I'm going to hang the center of a dipole from my tower. The question 
is really about attaching the two ends of the support ropes running 
through a pulley and down to provide for some movement in the wind.

Our yard has several trees which are good candidates. For a more 
permanent installation like this (vs a Field Day type setup) what is a 
good technique for attaching to the tree trunk? Screw eye into the 
trunk itself? Some sort of belt type affair around the trunk?

Thanks,

Tim, N9PUZ