Welcome Today I will show you what kind of stuff I use for base cabinet. The first one is the regular platform with levelers That cabinet is very heavy so I will not flip this over.I show you on mock up That made from 19 mm(3/4″)plywood. I used screw and 18 gauge nails… on the corner I attached the steel levelers On the top they have a notch for screw driver. Flat or Philips… First you installing, mean leveling that base.Then secure it in place by pieces of 3/4″ plywood and screws. Latter you put the connected cabinets on that platform and is done. First you installing, mean leveling that base.Then secure it in place by pieces of 3/4″ plywood and screws. Latter you put the connected cabinets on that platform and is done. That way is very convenient and useful with line of connected cabinets. Much less convenient for just one cabinet.In that case I use the plastic legs. For just one cabinet much easier is use the plastic legs. That is made of two parts… The bases of these legs have special supports that carry the weight from side of cabinet to the leg. that leg have a large adjustment range. About 2 inches … If even such a large adjustment range is insufficient. I cut it on the chop saw… That is just plastic pipe so… it is easy to cut it. that very useful stuff If you need to change the left-hand cupboard to the right and there is a drawer, there is no option but to fasten the hinge to the other side. But if there is not drawer the easiest way is to flip over the cabinet and installing the legs on the other side. I hope it can help in your projects… That’s it.See you soon.