All depends on your home style and your taste really ... Some Victorian Houses can look stunning with graphite or black internal doors as a statement piece - some cottages suit oak latched doors - a modern apartment can look fab with minimal flat, wall coloured, doors... So we'd need a bit more info about the age and style of your home really !

In fact we did, and we are very happy with it. I designed the solution and we found a good carpenter who built it for us. It's now bifold windows over the countertop and a bifold door next to it, allowing us to better separate the kitchen from living room, while able to completely open it up for an open plan feeling. I'm happy to provide more details if of interest

They do their own fixing (one link below), or check the broad category of product and find something similar. https://www.tilingsuppliesdirect.co.uk/product/jackoboard-board-fix-adhesive-290ml#.ZANJzi-nxvI Looking at your “stripped out” image above, that looks like a serious botch job. I would consider finding a cnc wood cutting company and get them to mill some perfectly circular forms in ply, say, to place into the hole and attach your flexible board to. You could get these made in 3 or 4 sections to screw together. Couldn’t find quite the right image, but this might give some food for thought. https://pin.it/6nzJppe

What about white internal and external frame for front door too? I have an anthracite grey front door with white frame because I have white window frames.