A followup to the followup! A guy saw me shooting thr RIQ ( rifle in question) at the range, fell in lust, and made me an offer I couldn't refuse. I was leaving the next day on a hunting trip so we had to wait for my return. Well, I'm back and just got off the phone with him. Bottom line, pending the conclusion of this imminent transaction, I'm ready to pull the trigger on a power feed and a DRO. I'm looking at an ALIGN 500D but I can't seem to find the spec on lead screw diameter. My HF 33686 is an RF30 clone and has a 17mm lead screw diameter. Anyone know if that's what the ALIGN 500D calls for?