I have a Gen 1 Kaos pump. The stock aluminum rod snapped in the middle of play and I had it replaced with a much stronger steel rod thanks to Adodin Customer service. No scratches or tool marks. It works great and with the new rod it is even smoother. This one needs to get off of my shelf I have a new toy in the mail.
I have a ccm feedneck that I can include for $15 extra.