My own A4000 I used a soldering iron to recap. Many of the pads lifted no matter how careful I was. Most of my 4000's caps are now non-SMT parts.
The A4000 I just recapped for a customer, I used my £40 Aoyue 8208 SMT rework station. Everything went perfectly, all caps replaced in just an hour or two.
I used just heat to remove caps and then put ChipQuik on the pads, placed the new cap, and melted the ChipQuik with the heat to fix the cap.
Worked beautifully.
