When I decided to build a slider, I integrated it into a storage unit to help organize my gear. I didn't go crazy and it was more of a proof of concept than an expensive drawer system you can buy pre-made. I used 1/2 inch pine shelving combined with baltic birch 1/4 plywood and then some 'heavy duty' sliders from Lowe's. My sliders are not the 'real' heavy duty sliders that can support upwards of 200lbs, but those cost over $100 for just the slides. My whole unit cost much less than that to build. Eventually, I will upgrade the sliders when they break.
So far, it has worked well for me and I am planning on building a frame over the fridge to better utilize that space. In addition, my whole unit is removable, if need be. It has served me well to Death Valley, Bodega Bay and Moab over the past year. Having the sliding function makes accessing the fridge so much more convenient.
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2001 Range Rover 4.6L SE (SD rack, ladder, Warn xd9000ce, steering guard, axle guard, diff guard, sliders, coils, 33in KM2s... no chrome)
2003 4Runner 4.7L V8 (wife's)
1985 E30S52 (1985 318i w/ 1998 M3 drivetrain, OBDI and 5-lug conversion)
Far better it is to dare mighty things...even though checkered by failure, than to rank with those timid spirits who neither enjoy nor suffer much because they live in the gray twilight that knows not victory nor defeat. - theodore roosevelt