Maximun hook potential for Medium-Low RPM players.

This layout may hook early and be inconsistent at the breakpoint for High-RPM players, use layout 2E instead.

This layout may hit the finger holes for High-Track players, use layout 1L instead.

Maximum hook potential with less mid-lane and more backend than layout 1E for Medium-Low RPM players.

This layout may hook early and be inconsistent at the breakpoint for High-RPM players, use layout 2L instead.

Maximum hook potential for High-RPM players.

Medium hook potential for Medium-Low RPM players

This layout may hit the finger holes for High-Track players, use layout 2L instead.

Maximum hook potential for High-RPM players.

Medium hook potential for Medium-Low RPM players.

Less mid-lane and more backend than layout 2E.

Pin between axis and leverage for medium hook ptotential and early roll.

Helps moderate over reactions.

This layout may lack hitting power for Medium-Low RPM players.

High RG pin position with the pin above the fingers for length. X-hole positioned for increased flare.

Moderate hook potential with skid/snap arc to fight early hook in the heads.

Lower hook potential than layout 2L

Smooth reaction for moderating wet/dry lane conditions.

Lower hook potential than layout 3E.

this layt may hit the finger holes for High-track players, use the layout 4L instead.

Minimum hook potential for dry lands and moderating over reactions.

High RG pin position with the pin above the fingers for length.

Brunswick�s ball drilling instructions include eight layouts; one group of four earlier rolling reactions (1E-4E), and one group of four later rolling reactions (1L-4L). Both groups contain layouts that adjust performance from high flare and hook potential to low flare and hook potential. Not every layout is appropriate for all types of releases. Brunswick separates bowler�s release characteristics by RPM rate and Track position.

• High-RPM Players and Medium Low RPM Players Hight RPM players rev the ball at reates greater than 300 RPM. On the men's tour rev rates range from approximately 250-450 RPM. Most of the men's tour players you see on TV would be considered High RPM players. High RPm players can be sensitive to "over-flaring" which can make the ball hook early and be inconsistent at the breakpoint. Brunswick recommends low to medium flare layouts for High-RPM Players.
• High-Track players and Medium-Low Track players. High Track players have tracks within 1" of the thumb and finger holes and will usually have a horizontal axis measurement near 6" from the grip center. Medium-Low track players have tracks that are greater than 1" from the thumb and finger holes and typically have horizontal axis measurements that are from 3 1/2" - 5".

After Determining Your bowler type and ball reaction needs, see the table below for recommended layouts. The Symmetric Core Layout sheet is divided into two columns for "Earlier Rolling" and "Later Rolling" Reactions.

• Earlier Rolling Reactions match up best oilier and wet/dry lane conditions, or for players who ahve problems with the ball going too long before changing direction. These will typically be players who have high ball speeds and/or medium-low RPM. rates
• Later Rolling Ractions match up best to shorter patterns and drier lane conditions, or for player who have problems with the ball hooking or changing direction too early. These will typically be players who have medium-slow ball speeds and/or high RPM rates.

Track	RPM Rate	Earlier Rolling Layouts	Later Rolling Layouts
High	High	3E	2L,3L,4L
High	Medium-Low	No early rolling reactions	1L,2L,3L,4L
Medium-Low	High	2E,3E,4E	2L,3L,4L
Medium-Low	Medium-Low	1E,2E,4E	1L,2L,3L,4L