hi guy's ,
sorry to use english in your forum, it's just to present you an electric retract system that will erase the air line:
www.e-retract.com
just plug and play like a servos, many angles ( and more to come) front gear with steering arms,all in metal and aluminium, only 88g for each, and can support up to 15kg for the RS999.
if you already have your air system, you can use the RS666 to replace your air cylinder by our electric actuator.
if you didn't have yet your retract and your plane is less than 6kg , us e the RS333.
all these retracts are made in France, in Toulouse , the city of airbus.
we 'are also on facebook where you can found many pictures and videos.
to finish our system exist since 3 year in united state , and i've bought the company to make this system know all over the world, cause i'm also an modeler like you.
i hope i haven't disturb no-one, if you have some questions , feel free to ask me, and sorry for my english again, i'll try somedays to learn this beautiful italian language.
have a nice fly.
christophe
ps if some wholesaler are interested they can email me.