Blanco sink - create own punch outs?

We just purchased a Blanco Silgranit sink that came with one hole punched out, and one ready to be punched out. The faucet we bought to go with this needs 2 holes (one for the faucet, one for the tap) and if we desire one additional hole for a soap dispenser. The sink does not have a third hole for the soap dispenser. We love the sink and love the faucet we purchased but obviously the sink is not ready for the soap dispenser (only 2 holes). Not a huge deal if we don't put the soap dispenser in, but would be cool if we could. The sink does have places where there is room for the soap dispenser if we were brave enough to create our own hole.
My questions are as follows:
1) Are we going to weaken/wreck the sink if we create a hole where Blanco does not have one pre-destined? 2) If it is okay to make our own hole, what is the best tool for this job? 3) Anything special we should look out for? 4) Blanco offers a limited life time warranty on this sink, any opinions on if we will void our warranty if we create our own hole? 5) If it is a bad idea to create our own hole, any other creative places to put the soap dispenser? i.e. hole in the countertop near the sink?
Thanks for any advice.
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I'd be interested in the answer you receive as I am also looking at buying a Blanco Silgranit sink and would like to put in a soap dispenser.
Dee
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We just bought the sink yesterday (Saturday) and tried contacting Blanco Canada but they are closed on weekends and we are installing the sink today. I'll give the U.S. number a shot today in case they are open on the weekends.
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We purchased the Avon model which has only 2 holes, but other models such as the Vision 210, Vienna 210, Somerset 210 have lots of extra punchouts (between 4 and 6 additional knock-outs) which would give you pleny of room for the soap dispenser. Unfortunately we didn't have many options for our purchase as we are trying to get our kitchen done before X-mas so had to purchase an in-stock model.
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Ah, I just check the U.S. web site and it looks like the models I mentioned are Canada specific (unless of course they just don't have them on the web site). If the web site is accurate, we have many more model choices in Canada but it looks like the U.S. models have between 3 and 4 additional knock-outs available.
blue wrote:

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I have a Blanco sink. I guess it would void the warranty if a crack developed where you put the hole. Is there much material around the hole? I would use a diamond hole saw the same as they do for granite to get a nice smooth hole. I love my sink it is undermounted and that to me is the only way to go regardless of what kind of countertop you have if you can make it work!
Wayne

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Ya a crack doesn't sound to pleasing, hate to have to buy a new sink because of something we did. We might end up switching our faucet set even if we don't like it as much.
We just have a laminate countertop and thought it wasn't possible to undermount with that. Have you ever seen it done?
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Undermount use different versions of the sink model. They come in undermount and topmount. The undermount has the top surround cut back so you don't have to punch through both the countertop and the sink.

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The last stainless steel kitchen sink we purchased (Franke) needed a couple of extra holes punched, and they were done by the dealer. It requires special punches to get through that tough stainless steel. Ordinary drills and files have difficulty cutting the stuff. I did have to make a small hole in one and used ever increasing drill bits and then a round file chucked in a drill. Took forever but I finally got a 3/4" diameter hole for a soap dispenser.
No, you won't weaken the sink, they (Blanko and Franke) are built like tanks. They expect extra holes to be punched into them.

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