Using a gyro in a Roo IMOHO tantamount to masking a minor problem that could be easily taken care of by some of the intelligent opinions given by some experienced pilots above.

If you use a gyro, make sure it is setup to off condition when the gear is retracted or you might end up with a nose gear that would not extend when you want to land (depending on the size of your nose gear cutout).

Finally, a gyro that you could not turn off when the gears are retracted would also work your nose gear servo during flight.

With more than 700 flights on a Roo, I am speaking from experience and take it FWIW.

If I may borrow what MOROCCO told PORTIA from the unabridged version of The Merchant of Venice

All that glitters is not gold;
Often have you heard that told:
Many a man his life hath sold
But my outside to behold:
Gilded tombs do worms enfold.
Had you been as wise as bold,
Young in limbs, in judgment old,
Your answer had not been inscroll'd:
Fare you well; your suit is cold.
Cold, indeed; and labour lost:


With regards to your other airplane landing fast, have you considered using crow? My TGA Interceptor use to come in hot and I listened to an experienced pilot (Kevin Whitlow) with many turbine flights on Interceptor than any one else I could remember and added crow to my setup and the rest was history.

Secondly, check your CG and make sure you airplane is not nose heavy. A nose heavy airplane tends to land fast.

Finally, deploy your flaps/speed break on your downwind leg to help bleed-off the speed. Check your turbine idle speed to make sure that it was not setup higher than the recommended factory specifications as that would increase your residual thrust during landing.

Regards

Ben