I just put holes in an Ultimate this week. I actually had a UI last year, drilled 5 x 5, but I could never get a good look with it, despite changing surface preps from 400 sanded to highly polished and everywhere in-between. I got to talking to a pro shop operator that I know, and he said that the UIs that he had drilled that had been most successful have had the pin no further than 4 1/2" from the PAP, with the cover smoothed but not polished. So I drilled the new Ultimate 2L, and took the cover up to 1200, and it's amazing just how much better it reads the lane than my old Ultimate did.
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Trumpet's Rusty Rat, JH, WC, Can WC...1/3/1992-2/14/2005
Horrid in Doubles, torrid in Singles...
...that's The Curse of Dusty.