I was looking to inset the banana jacks for speaker wall plates. Couldn't find anything out there, so made these. Also included the individual parts to allow for customization if you like. Printed with 15% support but can likely get away with no supports. Note the support only covered the deep flat (1" x 1/4") inset space that lies horizontal to the plane of the plate. The rest was without support and came out fine. Sliced with Slic3r and printed in PLA with a LulzBot Mini 1x. Full details here: http://www.plastibots.com/index.php/2018/12/27/3d-printed-banana-jack-inset-speaker-plate/
If you find this useful, please support me by buying something here: https://www.banggood.com?p=R90804949020201412E4