Online Community of Zenith Builders and Flyers
You buy the harbor freight one and then either send that nose piece to ZAC to have them machine it, do it yourself or buy one from ZAC
In case anyone is pondering this same question, I stopped at Harbor Freight today with the Zenith heads in hand to test for thread fit on the HF rivet guns. It turns out that the threads on the Zenith custom-machined heads will NOT fit the HF 3/16" Rivet Gun, but they WILL fit the 1/4" model (SKU 98898). There's a $30 price difference between the two, but you can get a 20% discount coupon (on-line) pretty much at will.
Just an FYI in case anyone is researching it here.
I did the same thing. Bought the 3/16" then returned it and purchased the 1/4". Works great. I have heard however of people buying the 3/16" and mailing the nose piece to Zenith to machine.
I got that same riveter. have had it for decades...built 5 or 6 planes with it and everybody around here has used it. also have done countless mods and repairs. the thing has probably pulled at least 100K rivets and still going strong. doing a tail mod on this 701 with it now. I keep around 1000 avex 4s around all the time for miscellaneous projects like this one. I've had some junk harbor freight stuff but overall it's been ok. that old rivet puller has been the best deal of all. their cup on top hvlp spray guns have been good for me too.
I tried it, and pitched it in the trash. Ditto for the green one that came with the Zenith tool kits of 10 years ago.
Got much better results with a hand riveter. Except for the first hundred or so rivets, I entirely hand-riveted my airplane.
I bought my from zenith factory build my complete 650 and it is working on another 650 i think it was around 100.00 probably pulled around 10,000 rivets. They got the special rounded heads for both the a4 and a5 rivets