I will be using Fastcraft in my modpack Under Siege on the FTB Launcher.
I have read the rules of copyright and distribution, and I will post this in the modpack's launch gui:
This pack contains <a color="aqua" href="[WIP|1.7.10] FastCraft 1.21">Fastcraft</a>,
by Player, enabled by default. Fastcraft enhances Minecraft with
increased performance. Bug reports being made directly to Mod Authors
should state Fastcraft is enabled.
A speedy reply would be great, and thanks