Okay for those of you contemplating using a homemade press, threaded rod and nuts, I'd think twice. If this is your first time pressing a BB into a frame I suggest you get the Wheels Mfg. press or one equal to it from ebay. I tried the homemade route myself and I destroyed the OEM (Workswell) BB that came with the frame. I even CNC'd custom drifts for the bearings and still ruined them.
You may not have the same result as I did with a homemade press but you'll never regret getting the right tool for the right job.
