They aren't bad to install just make sure to get them tight. I use loctite on mine (just the light hold stuff not the stuff you have to heat to get apart) I put a set of Robarts on the TF P-40. A friend of mine just installed a set of Gene Barton's struts on a TF P-51 and they look very nice. Installation was maybe just a touch easier with Barton's but they are both pretty easy to do. Price on Barton's was I believe a little cheaper than Robart's but I'm not positive. I am sure model has a lot to do with price. This should be a good email if you you want to check with Gene If not email me and I'll double check it.
[email protected]