Hi everyone Bob hebdon, newish to forum so hope you don't mind my 2 pennyworth on this! I've had 2 experiences with these b****Y things thankfully seperated by nearly 35 yrs. First one done in bedroom ( you do these things in strange places when you're only 16 ) fortunately only had to fit 'em and the went in easy using long threaded bar ,nuts and various washers plus lot's of washing up fluid. 2nd time time ,well I nearly pulled the shed apart heaving and straining etc ,gave up went to a local bike shop and he ,after nearly an hour pushed out and new one's back in using the shops large press .The pressure required he said was off the clock and we heard the bang when they gave way nearly 40 feet away and through 3 closed doors .Don't seem to recall a step inside it and he didn't mention one to me. I'd only do if nescessary ,however, if they need doing and you're going to get the swinging arm powder coated I'd do it after as I have been told the heat of the process will definately kill the new bushes, best wishes Bob.