I am using the FTB direwolf20 pack, and with v10.0.1.24 (with PR 4.2.2.19) it uses about 10 to 45% of my CPU on the server. But I wanted the newer mechanics + a bug fix, so I updated it to PR 4.3.4.29. There is now about 75% CPU usage, constantly. Does the latest build address these issues, or is this a problem I need to work around?

Well, I found the 30 release; so this is resolved.