Don't know if you've gotten the basing kits that GW puts out for 40k and WFB, but they have brass etchings in them for basing, and yes, as long as you have some snips, you can trim them pretty easily. If you want to test out some before you buy some from Forgeworld, Kendall has some of the basing kits... well, he did the last time I went in.
A tiny portion of humanity turned its back on mankind in the waning days of the last Golden Age. Over one and a half centuries later, the PHR has emerged from the shadows as an unrecognisable civilisation, its people irrevocably changed. They are no longer simple human beings, they are post-humans - cyborgs.