Well, I **** my reinforced cylinder and broke my case a few weeks ago.  You can see pictures in my build thread.

My question is, was/is part of the magical HRD formula to lightening the crankshaft with drilled holes?  During tear down this last weekend, I noticed that my crank has 4 1" holes drilled around the big end of the crank.  No pictures right now, but I should get some when I split the case.

Can anybody confirm this procedure?  Seems that if you lighten the crankshaft assembly, wouldn't there also be a procedure to lighten the countershaft balancer to keep the engines rotating mass 'smooth'?

If the holes do not hurt the balance of the crank I would not worry about it.  The bottom line is does it vibrate more than a stock crank?  I have not seen where the holes are located as to whether it may affect the strength of the crank.  I personally believe these types of crank lighting modifications fall into the same category as machining the OD of the ignition flywheel to lighten it..............snake oil. 

I also have the equipment to perform these types of mods but I try to keep them busy performing modifications that make noticeable gains.