Rad , I am a huge advocate of budget electric retracts, especially with the inconsistant behavior of the Robart electric retracts.
My beef is with Changsun. I am very glad that you have had good luck but for me and the tail wheels, the process of installing them and have them go bad is to much of a risk for me.
I had two sets go out on my P40 ( main gear ) . Park RC was also selling them in the states and he finally got tired of the returns.
The other big retailer is Graves RC in Orlando, don't know if they still sell them but they were full retail like Shulman.
I wish you nothing but the best on these gear, just expressing concern from my experience.