On Monday, October 24, 2016 at 2:16:19 PM UTC-6, Jonathan St. Cloud wrote:
Thanks Steve, I do remember now reading about that. Makes sitting down with a tiny drill bit and a six pack seem worth it.

On Monday, October 24, 2016 at 12:14:25 PM UTC-7, Steve Leonard wrote:
On Monday, October 24, 2016 at 1:49:18 PM UTC-5, Jonathan St. Cloud wrote:
One would think if the blow holes did not add much a pencil pusher at the factory would realize they could have lots of man hours ($) by just using dimple tape.

Another claimed, but I don't know if it was ever proven, benefit of the blow holes is that even if they are behind the leading edge of the laminar bubble, they can still "blow out far enough to burst the bubble and get the advantage of not having the high drag, laminar bubble" whereas, turbulator tape inside the bubble does nothing at all for you.

It is all about how much are you willing to do to get that last half percent.

I get these on Ebay. Works good on my 29. I find that inflight dust and bugs do get in and I do clean them several times a year. If you drop them, they do break rather easily.

..024" 0.60mm #73 - Five Carbide Drill Bits -

Best. Tom #711.