i did the same thing you are talking about. i had a machine shop make a bunch of shit for me and it was fuckin expensive. i have done many roundhouse conversions on stock swingers. pretty simple to do but then again its still a stock swinger. sellin swingarms is hard too, ppl dont wanna pay for shit. ive had a hard time sellin some +4's ive had. i dont think 275 for a heavy duty chromoly swinger is too bad. the ones im making are mild steel, simply because ive bent the fuck outta chromoly ones just as easily. im just gusseting the mild steel ones..