Review on Shop Fox D3031 18-Inch Full Ext Drawer Slide 100-Pound Capacity Side Mount, Pair by Johnnie Trimble

First, I got these to serve a specific purpose that isn't a drawer. My condo HOA won't let me replace a window frame without a major hassle and headache, and these were installed in 1980. Not good at keeping sound or heat out. What's worse is that the window looks out onto the roof (mine is a 2 story unit, upstairs, so my loft overlooks the roof) which has 8 AC units (4 packaged, 4 compressor only). These get noisy and I get resonating hums at times that almost physically make me ill. So I've done some sound dampening on that wall, with the final step being the window frame. I decided to build an inner frame with a 12" divider in the middle using mdf, neoprene, and hardwood boards on the visible layer for aesthetic. I have 2 24"x36" 1/4" plexiglass sheets that I framed in hardwood, sealed. These drawer slides are mounted just above and below my existing frame, and the plexi frames mount to the drawer slides. Thick neoprene provides insulation while the window is closed. They latch into 2 magnetic catches that are push to latch, push again to unlatch. The neoprene is placed properly to give a solid seal with the windows latched. The plexi windows have frosted tinting while the outer windows have mirrored tinting. With both window panels latched, it is airtight by both my positive pressure and negative pressure vapor tests. The heat reduction is great, the sound reduction is great, and the slides make the windows slide effortlessly. I can easily use a belt/pulley with a stepper motor and driver circuit to give myself a "smart" slider. Oh, and the 2 inch slats blinds between the windows are already motorized for rotating the slatsProbably the most difficult part of this setup was making sure the weight is balanced between both top and bottom slides, and that they are perfectly aligned.These are great drawer slides at a great price and effortlessly do what I need them too. I'll be ordering another set or two for the under counter addition project that's next.