Hi Grimlock!
I agree with Charlie and Colstonman! Maybe you should think about it this way: Save $40.00 on the gyro then and spend $30.00 and a bunch of down time on repairs that you probably wouldn't have to do if you had put the HH GY-240 in to start with?
And then realize your mistake and spend $100 bucks on the GY-240 .... Hmmmm!?!
If funds are short, I would recommend waiting a bit and saving up the extra cabbage, as you will spend twice as much in the long run if you cheat in the beginning!
The GY-240 is worth it's weight in gold!
Incidentally, I wonder if the guy from the local hobby shop has actually flown a Corona??
My 2 cents.
Happy Choptering,
Russ