Best Pentax (K Mount) Adapter for Canon 80D?

Have a bunch of fast, manual focus lenses for my Pentax 35mm cameras that I would love to use for portraits.

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I'm looking for the best, rock solid adapter that isn't going to get stuck in the camera or on my lenses.

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Price doesn't matter at all - I'm saving so much money by not having to buy a ton of extra glass that I'll gladly pay as much as it costs for peace of mind with these adapters.

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Thanks!