Gadget to Slide Chassis in and Out of Cabinet

[fixmeplease]

Im working on a 1953 Westinghouse 21" Cabinet TV and got it working. Some more caps to change, etc., but this chassis is too heavy to be pulling in and out. I know Ive seen a post on it but couldnt find it. What's a good item to use to slide it in and out, and preferrably to sit it on something (when slid out) and work under it if need be. Some type of runner but Im sure a few of you have suggestions of things youve made. Thanks in advance!