Very tasteful and sane, but check out the Zeus 2000 arms on my early 80's Austro-Daimler Superleicht on the CR site:
These came from the factory this way. The factory drillium jobs on Zeus 2000 cranks varied a good bit. These arms are among the more radical ones. Some were only deeply milled, sometimes on multiple levels, but not all the way through the crankarm. But this is by no means the only pair I have seen that were slotted all the way through. I've not heard any reports of an inordinate failure rate for Zeus 2000 cranks, so I guess the boys at Eibar knew what they were doing.
Bog Spring, Texas, USA
> From: Otis <email@example.com>
\r?\n> Subject: [CR] KOF Drillium
\r?\n> To: firstname.lastname@example.org
\r?\n> Date: Tuesday, May 26, 2009, 2:36 PM
\r?\n> As long as we're on the subject I
\r?\n> thought I'd share some millium-drillium pieces I've been
\r?\n> working on lately.
\r?\n> I'm trying to subscribe to a "safe and sane" approach with
\r?\n> pretty minimal material removal (except for that last stem).
\r?\n> There will be no holes punched through crank-arms.
\r?\n> I think it's a cool way to personalize your bike.
\r?\n> Jon Williams
\r?\n> Grants Pass OR USA