I run Hobbico retracts in a TF (red box) P-51B Mustang. The mod sounds like a good idea. We have paved runway and I land very well however my retracts have seen hundreds of landings and they contantly need tweeeeeeking. I don't taxi after landing and my take-offs are as short as needed. They are a pain. I'm currently trying to get new Hobbico struts. Let me know where you got the 3/16" struts!!!!