Welcome to bowlingchat.
When I am figuring out a benchmark the first thing I look at is the tilt. Then the Dual angle ratio guide is used to get you close with the ratio.
http://wiki.bowlingchat.net/wiki/index. ... atio_Guide" onclick="window.open(this.href);return false;
Secondly I look at rotation to get the ratio closer.
Next I figure out if the bowler is speed dominant, rev dominant or match speed to revs. This info helps zero in on the ratio from the guide.
http://wiki.bowlingchat.net/wiki/index. ... evRate.JPG" onclick="window.open(this.href);return false;
Then the totals. Starting at 95* for a matched speed to rev bowler and adjust up for rev dominance or down for speed dominance.
Adjustments are then made for tilt and rotation.
High rotation or high tilt will lower the totals.
Low rotation or low tilt raises the totals.
ex. for a bowler that is match speed to revs with 10* tilt 60* rotation
2:1 ratio 100* total, I raised the total because of the slightly lower tilt of 10*
100/3=33, this is the 1 in the 2:1 ratio, the VAL angle
100-33=67, this is the 2 in the ratio, the drilling angle
I would round these numbers so it looks like 65-xx-35, this is for the Asymmetrical benchmark
Next you need to figure out the pin distance xx.
I start at 4" pin to pap and adjust from there. With 10* tilt and 60* rotation I would shorten the pin to pap to 3.5"
So the Asymmetrical benchmark for my example would be 65-3.5-35.
The Symmetrical would be figured from that and be 70-4.5-30
I suggest using the search function at the top of the page and search "benchmark" and study the benchmarks given for the bowlers specs. Get involved in the posts to gain a better understanding.
I know I didn't cover everything but I hope this helps.