Aye, sickles were one of those first-to-craft stone tools I made before Treecapitator became compatible with FTB, and they're still useful for silverwood trees if you want to create aura nodes, but don't wanna cut the wood. Though, personally, I find silverwood trees to be just too...nice-looking to bear being able to cut down one I, myself, planted.
Also, combining RedPower and PowerCraft seems to be...quite a good way to automate things like tree farms. Get a PowerCraft harvester, a pulsar (or RP timer, if you prefer), and a line of xychorium soil with saplings on it, and...bammo. Put deployers down wherever you want saplings to go, send saplings that you farm off into your deployers...I dunno if you can send things to them with PowerCraft conveyor belts, that's something I'll have to test. Or make a system that keeps only a handful of saplings in every deployer, so you don't end up getting one with 9 stacks of saplings, but the rest have zip.
Musssssssst tessssssssst.