I recieved a Top Flite P-51 Mustang 65" gold edition kit ( Not Giant scale ) for Christmas and i am wondering exactly what i need to get for the retract system. I saw Robart Robo struts, Century Jet retracts, air systems, ect. ect.. on tower hobbies

I have never installed a retract system on a plane so im abit confused on what exactly i should buy. Any help is appreciated.
Also i want to install a retractable tailwheel.

Also if there are any problems or issues that anyone who has built this kit knows of offhand that info would be helpfull.

Thanks again!