My Terror is drilled 4 1/4 x 4 compared with my pap. I have tried several surfaces from box to 2000 polish with not much luck. The ball just doesn't have much backend. I am a medium track tweener with 15.5 mph speed. I bowl on a fairly good shot with some backends. Any ideas on a drilling that might work better for me.

The Terror is a low rg center massed cored ball, meaning it rolls. It order to get it to flip you have to go with a bigger drill angle to get the ball to transition later downlane to give you the hockey stick. The layout is a very strong one so it gets the ball started earlier which is why even if you put a lower grit surface on the ball its still burning. You want to go 1000 or 1500 or 500, rough buff to matchup core and cover, otherwise, you have the core working against the cover.

Hey Kong,

With CG so close to the fingers, did the ball need a hole? How much finger and side do you have? Too much finger weight could be an issue.

My son's Terror has been awesome for him. I did resurface it to 500 then Rough Buff to get his to pick up the mid-lane better.

A lot of the people I.have talked to say their ball hooks a ton on the end so I think I might have to get the drilling changed to fit me

I think the layout is not optimal for what you are looking for.  A 4.25 pin with only 15 mph for a high end ball, plus the lower rg, usually equals to more roll and less backend.  My suggestion would have been to put the pin at 5 inches and kick the mass right of the thumb about 2 inches.  That would put the pin above the bridge or close to above your middle finger and the cg would have been under your ring ringer.  That would increase your drilling angle and help that ball pop on the backend more. 

A guy on my team got one drilled up and with the factory polish on it, the ball squirted like crazy on oil so he uses it now when the lanes have burned up a little and the Revenge and Nightmare are too much.  We did similar layouts with all 3 balls so he starts with the Nightmare, then balls down to the Revenge, and then the Terror once the other two start hooking too much too soon.  Because he has gotten several DV8 balls, I have gotten pretty familiar with them.  His axis is around 4 5/8 by 1 up and ball speed around 15-16 at release.  He has a Nightmare at 4 inch pin, mass stacked, no weight hole and we had to do a surface adjustment to get it to roll good.  We took it to 1000 abralon with Rough Buff, no high gloss and now the ball is stronger overall than box finish.  However, he cannot get deep with it because that 4 inch pin layout makes the ball want to read too soon and has no angle in the backend to carry the corners.  Thats when we go to the Revenge with the 5 inch pin and surface at 2000 with Rough Buff.

My issue with pro shop guys, is that when someone has a slower ball speed and drilling higher end stuff, why put the pin in a rolly position when the ball is designed for backend?  That makes the ball really weak on the backend.  Put the pin around 5 inches to help the ball get down the lane and then adjust the cover to get the desired backend (shiny for flippy and 2000 or 4000 abralon no polish for controlled reaction).   

 When I first drilled up my Terror and used it in the summer for practice it was a beast, then entering the league season, not so much. Two reasons me and the surface matching the condition. I got myself straightened out and found that for me the proper surface in everything on this particular piece. At one house I need it 500/2000 and one in a green scotchbrite with minor polish added and  at the third house I go 1000/2000/4000 and burn the polish on. Until I found the proper surface for each place the ball was "weak" compared to the conditions I had used it on during the summer.