Your advice certaily makes sense.
I'll have to take into account the nock length (got no nocks either)
I'll just measure a stick of some sort at full draw.
How much should I subtract for the nock? 1/4"?

I likewise shoot a Katera XL at 29" DL. For optimal spine, use a .400 arrow and cut it at 29-29.5" and tip it w/ a 125gr. tip. If you're looking for SPEED, at 55#, you coul get into a SHORT 27.5 .450-.500 spine arrow and tip it w/ a 75-90gr tip (I'd have to run the numbers, but I know something in this range should/would work). At 68-72#, I ease of in the later season when it gets cold, I shoot a .340 spined arrow that is 29.5" long, and has a 125gr tip on it. These are actually a touch stiff for the lower weight setting, but still fly quite well even w/ a BH on the fore-end. Hope some of that helps.

Indeed it is. It's just the info I was after !:happy0001:
Any thoughts on the Duravane Predator vanes ?

Take care

I'm a big fan of blazers, as I feel they do a GREAT job stabilizing arrows in my experience, but I have some arrows done up in Bohning "killers" I think that are the same material as BLAZERS, and they're AWESOME as well. :happy0001: The Predators are pretty much the same vane under a different name or it would appear as so.

29 inch arrow. Is perfect for 29 and 30 inch draw !