Who here has used a Powertrain Technology hydraulic throwout bearing?

Hi all, as the title says, im wondering if anyone here that has used or is using a Powertrain Technology hydraulic release bearing, in particular their Street-Max one, i have been quoted by them a price of $319 US which im ok with, but what i'm unsure of is the website says it does't need any shims / or anything to adjust so how do you set up the gap between it and clutch fingers? i'm a bit of a newbie when it comes to these things so any advice is much appreciated.

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