Luxury Bee Condos

We have been trying to figure out pollinators. We can't have European honeybee colonies here because of the local bear population, so we have been exploring the Orchard Mason Bee (Osmia lignaria). Yesterday, we constructed some luxury bee condos. These are the Ray Wolfe models of bee housing (he is a guy who's houses sell at a premium because of quality construction). Here are pics. We placed the condo on an old worm bin we had which cannot be used anymore due to bear predation. Nice base for the bee condo though.