Sir Wildmine . . . . . . .
First . . . . . in looking at the router specs . . . . it optimizes out at its greatest capability if being supplied with 48VDC at 8 amps . . . to eventually use up to 400 watts.
The supply that you designated was only outputting 12VDC, thereby potentially giving somewhat of a bucolic and lackluster performance.
That is as being compared to what your unit COULD, do on its max end if running at up to 48 VDC.
Instead, consider this unit below, with a 48VDC output at up to 8.3 amps, then your controller, that it then initially feeds into, then lets it get just as frisky as its machining /load operation needs . . . . on up to that max spec of your router.
http://www.ebay.co.uk/itm/400W-48V-...542406?hash=item33be730a46:g:1GAAAOSwFV9Xyox7
73's de Edd