Wayne, welcome, i second the 91 as being a great choice, it will not get you IN any trouble, it will only get you out of trouble if anything
and will be good on consumption also, i would start out flying only 7-8 min. at a session untill you get it leaned out and then you can go more after you see how much fuel you use.
the pinned hinges will be fine, i use dubro pinned hinges.
to tune that 91 you will need a tachometer(also to break it in so you can keep it down to 4000 rpm for the suggested time, then you can take her out and wind her up to full throttle and lean her down till you get max rpms,( a 15x4 or 14x6 will do great with the 91)then after you reach max rpms just richen her up till you drop down 300rpms and fly it there, should be some where between 8600-9000 rpm.
and above all, do not be nervous because when you lift off you gonna be doing nothing but smiling after 4 mos on that trainer
go here to learn more about saitos and if you have any hard Q's about them, there is more smarter guys there
http://www.rcuniverse.com/forum/m_33...64/key_/tm.htm