Retracts for my Mossie

so ive got a set of robart mechanical retracts at home that will fit the diminuative size of the mossie quite nicely. But mechanical retracts are a ballache, getting the links setup, getting the servo not to bind, collapse etc etc etc

so i was browsing Hobbyking and i came across this neat little set

Micro Pneumatic Retract Landing-gear set suitable for models up to 3.5lbs.

Specifications :

Low profile 0.472in (12mm) when retracted

Frames 6061-T6 & 7075 aviation grade aluminium

Auto down if air tank is empty.

Each Retract weight : 10g / all parts 88g

Suitable for EDF & Warbirds models up to 3.5lbs

$59.94 which is NOT BAD. if you compare it to an equivalent robart pnemautic system

I would only use the main gear though on the mossie. not the nose gear obviously.