I have a set of 1/5 scale retracts that I bought thinking that they would fit my newly adquierd Top-RC P-51, and they would have fitted if for the simple reason that they work reverse of the way the regular retracts work , they retract out wards instead of in, like the regular ones that are made by Robarts, they are for a 1/2 struts and are brand new in their package with the instruction if it was not for the fact that they work backwards of what I need, I would keep them, but at this time I have to try to get my money back at least so I can put it towards buying the ones from Robarts I paid $225.00 for them and that's what I asking for them, this are a beautifuly made and very sturdy and can easily support at least 40 pounds of airplane I was going to use them in an 89- Top-RC- P-51 that will weight at least 24 pounds but can't so they will go to some one that can use them maybe in Spitfire or Folkwolf or something like that that need to retract out instead of in , thanks for looking . Cordially, C Rod. * addedum-These are ne CNC quality machined alloy electric retracts. heavy duty. Made out from 7075T duraluminum. Quality servos. It comes with a sequencer module. Excellent for Warbirds WWII. Will take in 2.73 mm or 1/2 Robart Struts or any other having the sam O.D. Operating Volrage 5.0-6.0 V.