I made a sled for my bosch 4100 jobsite year ago out of 3/4" melamine with plastic runners and a 1.5" oak fence. It was nice but heavy.

What would be the ideal size for my first sled for my 3hp Unisaw? Making cutting boards, cheese boards etc. My miter saw is a hassle to setup so likely cutting material with crosscut sled more too.

I'm trying to decide between mdf, birch or melamine. Finding melamine coated MDF would be nice.

I'd like to add a single t-track on the sled so I'll likely need 3/4" right? Would 3/4" MDF base with 1.5" oak fence be too heavy if it's say 30" wide x 25" inside depth?

I don't think a 3/8" miter track will fit well in 1/2" mdf.