Dave you're not dense I wrote the post too quickly the struts are a separate item for people who have retracts to put in and you could use anything the plane will take spring airs, or robarts or whatever you have that retract sideways (no bvm bobcat ) the price of $595 for the eurokit set includes three retracts three struts with trailing link suspension air tank, wheels tires and brakes inserts for the tires if you want to use them (I do) a proportional brake valve servo operated, and retract air valve and a one way fill valve complete set of 3mm tubing and festo connections for the brakes and 4mm tubing with festo fittings foe the retracts all of which goes together with a snap and works perfectly without any air leaks the first time you use it , ......they even give you the right screws to mount the retracts in the airframe ! hope that clears matters up sorry for the confusion. Malcolm