I'm reading the GETVPN deployment guide (for work, not for fun) and it states you should have two KS routers and two GM routers. Is this really necessary? I have a MPLS WAN of about 20 sites (30MB peak traffic) and justification for four routers doesn't seem practical. Even two router might be a stretch. I can get them if necessary, but are they? Anyone have GETVPN up and rolling? Any other gotchas or tips are appreciated too.