After watching plenty of videos of industrial setups running at crazy feed rates but quite shallow cut depths, I thought I would give it a try on the X2.
I was surprised at how effective it was, achieving over double the removal rate I was getting on my 'normal' roughing strategy. The finish is excellent too.

NORMAL:
Depth of cut 0.8mm
Feed rate 100mm/min

HSM METHOD:
Depth of cut 0.2mm
Feed rate 1000mm/min

I run a Proxxon IB-E spindle at 20,000 RPM with a 2mm solid carbide 2-flute cutter. The only coolant is an air blast.
I also used a 500mm/min 10 degree ramping plunge instead of a straight plunge at 50mm/min. The only downside I can see is greater machine wear.

http://www.youtube.com/watch?v=HC4MzJv3cUU

that is simply wonderful to see in operation. Hope to have mine run just like that sooner than later!

Thats awesome! Really neat, I likey :)

Thanks. I will definitely be using this strategy in the future whenever I run this spindle. It puts much less load on the Proxxon motor and bearings.

Has anyone tried any other roughing method? Like trochoidal milling?