[TowerTalk] MA550MDP Questions

[WD0M]

Does anyone have experience with US Tower's MA550MDP?  I'm considering 
getting one to use with my new SteppIR 4 element antenna.  Plans are to use 
the rotating base with this tower.  My HOA agreed to my installing a 55 
foot tower, retractable to less than 25 feet when not in use - of course I 
plan to use it just about every day!  ;-)  I'm still trying to figure out 
how to attach a mast to the top of this tower.  Any hints?  Any 
installation issues?  Comments pro/con?

Thanks in advance.

73,

Joe
WD0M