Define "high end"-I'm omnitoad on my 2yr old phone, because they don't make sliders anymore and that's the best I could find. Much better than the stock garbage, and worlds better than an i-device. I hear what you're saying though.

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment